If hydrogen were used as a crack detector (it is not because of the fire hazard), it would escape four times faster.
如果把氢用来作裂缝检查(人们不这么做并是因为它们有火灾隐患)，他们逃逸的速度会比氦快四倍。
3
Under the best conditions by means of hydrogen flame ionisation detector, 101 white silylation carrier a and se-30 anchored phase edc., the good results have been obtained.