Please balance your ability before you help them and bewared . Some of them may hurt you by your have a kind heart .

帮助他们要量力而行，也要小心，否则他们也会利用你善良的心来伤害你。

The great harm of particulates emissions from diesel engine has been more and more bewared by people , and becomes one of the key problems of diesel engine 's development in the future that need be solved urgently .

摘要柴油机的微粒排放物所造成的巨大危害性越来越引起了人们的关注，已成为柴油机今后发展急需解决的关键问题之一。