It is important to avoid the use of uranium compounds of unspecified isotopic composition. 要避免使用那種非專用的同位素成份的鈾化合物。
The conductivity imparted to the air can be ascribed to ionization produced by the rays emitted bythe uranium compounds. 空氣的這種導電性可以看做是鈾化合物放射出的射線產生電離的結果。