It is often helpful for teachers to shadow managers in industry.
教師跟隨業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。