“軍政府造四川銅幣當制錢壹佰文”，本就是遺存稀少，更為難能可貴的是左圖這枚銅幣還是正反兩面同一位置處逆轉了四十五度。這一情形在之前發現的錯版幣中，十分罕見，這便是行話裡的“逆背”了。如此整整逆轉四十五度的可謂陰差陽錯，自成一景。
"The military government made Sichuan copper coins as the money to make money". This is a rare relic. What is even more commendable is that the copper coin on the left is reversed 45 degrees in the same position on both sides. This situation is very rare among the wrong plates that have been discovered before. This is the "reverse" in the jargon. Such a complete reversal of forty-five degrees can be described as a yin and Yang fault, self-contained scene.
據市場上的投資者介紹，四川銅幣是大眾收藏品，收藏者有一定數量，前期國內各區域都有實力型買家介入四川銅幣板塊，在一定程度上控制了市場供貨量，導致其價格快速走高。同時，四川銀幣的價值也在同步上升。從藏家和市民的接受程度看，預計後期四川銀幣的價格還將繼續上漲。俗話說：“物以稀為貴”，由於該錢幣作為特殊歷史時期、地方政權的特殊貨幣，具有不可替代的文物價值等特點，從收藏與投資角度來說乃非常珍貴。
According to investors in the market, Sichuan copper coins are mass collectibles, and collectors have a certain number. In the previous period, all regions in China had strong buyers involved in the Sichuan copper coins plate, which to some extent controlled the market supply volume and led to its price. Fast rise. At the same time, the value of Sichuan silver coins is also rising. Judging from the acceptance of Tibetans and citizens, the price of Sichuan silver coins is expected to continue to rise in the later period. As the saying goes: "Things are rare and precious." Because the coin is a special currency of special historical periods and local governments, it has irreplaceable cultural relics and other characteristics. It is very precious from the perspective of collection and investment.
鉲元素原礦石
名稱：鉲元素原礦石
年代：天然
規格：重13.7g
介紹：自然界中的鉲少之又少，而要合成的話只有在特定幾個地方才行，鉲是一種銀白色的錒系金屬，處於純金屬態時，鉲是具延展性的，可以用刀片輕易切開。在真空狀態下的鉲金屬到了300C以上時便會氣化。
Introduction: there are few thorium in nature, and only a few places to synthesize, thorium is a silver-white actinide metal, in the pure metal state, thorium is ductile, can be easily cut with a blade. When the thorium metal in vacuum is above 300C, it will vaporize.Idaho National Laboratory produced a significant amount of cesium for the first time by radiating plutonium targets. The results were released in 1954. The high spontaneous fission rate of yttrium-252 can be observed in the resulting sample. In 1958, scientists conducted experiments for the first time.
愛達荷國家實驗室通過對鈽目標體進行輻射，首次產生了重量可觀的鉲元素，並於1954年發佈了研究結果。產生的樣本中能夠觀察到鉲-252的高自發裂變率。1958年，科學家首次對濃縮鉲進行了實驗。
There is a very small amount of helium on the earth, which is mainly found in uranium mines with high uranium content. After uranium captures neutrons, the ore containing helium is beta decayed to form helium. Tantalum can also be found near facilities that use tantalum for prospecting or medical treatment. is not easily soluble in water, but it sticks to the soil, so the concentration of earthworms in the soil can be 500 times that of the water surrounding the clay particles.
地球上有著極少量的鐦，主要出現在含鈾量很高的鈾礦中。鈾在捕獲中子之後，含鐦礦石進行β衰變，從而形成鐦。在使用鐦進行探礦或醫學治療的設施附近也可以發現鐦。鐦不易溶於水，但會黏附在泥土上，所以泥土中鐦的濃度可以比泥土粒子周圍的水高出500倍。能夠利用的鐦的數量非常少，使其應用受到了限制，可是，它作為裂解碎片源，被用於核研究。該元素是世界上最昂貴的元素，1克價值1000萬-2000萬美元， 是金子的50萬倍，可用作高通量的中子源。 在核醫學領域可用來治療惡性腫瘤。由於鐦-252中子源可以做得很小很細，這是其它中子源所做不到的，所以把中子源經過軟管送到人體腔內器官腫瘤部位，或者植入到人體的腫瘤組織內進行治療。特別是對子宮癌、口腔癌、直腸癌、食道癌、胃癌、鼻腔癌等，鐦-252中子治療都有相當好的療效。
The very small number of cockroaches that can be used limits its application, but it is used as a source of cracking debris for nuclear research. This element is the most expensive element in the world. One gram is worth 10 million to 20 million U.S. dollars, which is 500,000 times that of gold and can be used as a high-throughput neutron source. It can be used in the field of nuclear medicine to treat malignant tumors. Since the -252 neutron source can be made very small and fine, which is not possible for other neutron sources, the neutron source is sent through the hose to the tumor site of the human cavity organ, or implanted in the human body's tumor tissue for treatment. In particular, for uterine cancer, oral cancer, rectal cancer, esophageal cancer, stomach cancer, nasal cancer, etc., the neutron-252 neutron therapy has a very good effect.
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