I called the police but they weren't very helpful.

　　我叫了警察，但他們不太肯幫忙。

　　You'll find it helpful to talk things over with a friend.

　　把情況和朋友詳細聊一聊，你會覺得大有幫助。

　　The people I spoke to were very helpful.

　　我交談過的人都很肯幫忙。

　　The ship was helpless against the power of the storm.

　　那艘船只能任憑強大的暴風(fēng)雨肆虐。

　　It's natural to feel helpless against such abuse.

　　對這種虐待感到無能為力是自然的。