steric effect meaning in Chinese

空间效应
立体效应
位阻效应
形位效应

Severe steric effects at the reactive carbon would impede the substitution .
大的立体效应阻止在碳上的取代。
Steric effects in 126 may also be responsible for its inertness to the grignard reagent .
（126）的空间效应也是它对格氏试剂反应迟钝的原因
Steric effects in rate constants for bimolecular dissociation
离解反应速率常数中的方位因素
Steric effects in 126 may also be responsible for its inertness to the grignard reagent
（ 126 ）的空间效应也是它对格氏试剂反应迟钝的原因