Be fearful of...
害怕...
🧩 词语组成解析
be
[bi]
v. 是;有，存在;做，成为;发生;
aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质;
🗣️ 情景例句
I'm sorry, I really don't know.
对不起，我真的不知道。
Would you please leave the door unlocked for me?
可以请你为我把门锁打开吗？
But this does not matter, for, as he has often remarked, one is never too old to learn.
但这没有关系，因为正如他常说的那样，人要活到老学到老。