for a moment跟for the moment有区别吗?

for a moment
片刻,一会儿
He might have popped in for a moment,since he was passing this way.
既然他从这里经过,说不定他会突然来呆一会儿的.
for the moment
暂时,目前
I have nothing to do for the moment.
我暂时无事可干.
For the moment we are content to watch and wait.
目前我们甘心在一旁观察和等待.
请及时采纳,不懂继续问( 天天在线 ）