helpful是什么意思

双语用例

• Students said it was helpful if the teacher corrected their pronunciation.

• Any increase in production would be helpful.

• You get the odd person who's rude to you but they're generally quite helpful.

• You should find this guidebook helpful.

• She made some very helpful suggestions but her boss rejected them all.

• The research indicated that it is helpful for the teachers to focus on pupils' learning processes rather than only on their learning outcomes.

• As to more technical aspects, an index would have been very helpful.

• Molecular biological techniques are very helpful to detect parasite-induced changes in the regulatory systems concerned.