Question

for a moment和in e moment的区别

Answer 1

for a moment指的是某动作或状态延续了一小会儿。

Electric currents persisted only for a moment. 电的流动只持续短暂时间。

For a moment he forgot his errand. 有一小会儿，他忘掉了自己的使命。

in a moment指的是一小会儿以后，或者是片刻之间。

I' ll come in a moment. 我一会儿就来.
In a moment he would be gone from view. 再过片刻他就会从视野里消失。

Why destroy everything in a moment of madness? 为什么要让一时的冲动毁掉一切呢？

Answer 2

for a moment = 一会儿

in e moment = 在某一时刻