international standard source的用法和樣例：
例句
- If the component of tritium is different between the level radioactive source and the sample, system error is produced, and it must be corrected.
所用標準源成分如與試樣不同，將帶來(lái)系統誤差，應予修正。 - It proved that the airproof ability of standard sources prepared is fine for measuring the radioactivity of uranium series nuclide fully.
證明制備的鐳標準源密封性也非常好，完全能滿(mǎn)足測量鈾系核素的要求。
