Q. Im noticing water in my oil. Do I need to replace my oil seals?

问题我注意到油中有水。我是否需要更换我的油封？

youdao

Do I need to replace my driver tube every time I replace my power tubes?

我每次更换后级电子管的时候是不是必须把前级管也一起换？

youdao

What documents do I need to apply for my first card, or to replace my Permanent Resident Card?

什么文件，我是否需要申请我的第一张卡，或以取代我的永久居民身份证？

youdao

"I think I need it to do all the things it can do, like book reading, and to replace my computer during trips abroad."

VOA: standard.2010.05.28