Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration,and a thermal surface ionization mass sepctrometry equipped with multicollector has been used.
采用全蒸发技术、离子流强度积分的方式,用多接

表面电离质谱计测量铀同位
丰度。
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Now, there's stable internet that works thanks to a tower high enough to pick up a telephone signal which it then sends into the villages via solar-powered receivers a type of gadget, meaning a small, electronic device which does something useful.
现在,由于有一个足够高的塔来接收电话信号,然后通过太阳能接收器将其发

庄里,那里有了稳定的网络。 太阳能接收器是一种小工具,那是指可以做一些有用之事的小型电子设备。

