3.The thief peeped through a keyhole to make sure there was nobody inside.
小从钥匙, 以确定里面确实没有人。
4.I squinted through the keyhole.
我从锁眼窥。
5.Objective To summarize the results and experience of supraorbital keyhole approach used for the patients with tumors or aneurysms at superincumbent sellaturcica.