It is often helpful for teachers to shadow managers in industry.

　　教師跟隨業(yè)界的管理人員實地學習，常常會很有收獲。

　　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 booklet should be very helpful to parents of disabled children.

　　這本小冊子對于殘疾兒童的父母會很有用。