1.creep in 悄悄混進
If you creep in, please don't let it show.
如果你想在外面偷偷混進來,請不要讓人知道。
2.take one's word for it 相信某人說的話
But don't take their word for it.
但是,也不要把他們的話當真。
3.in one step 一步完成
We drill the holes, fill them with sodium and seal them all in one step.
鉆孔填鈉密封,一步就可以搞定。