1. all of a sudden: 突然地，出乎意料地

eg. All of a sudden it will feel as though your days are almost empty.
某一刻你會忽然感到好像你的每一天都幾乎是空空的。

eg. All of a sudden, I want to tell you about some things I do value and why.
突然之間，我想告訴你一些我確實重視的東西，以及重視它們的原因。

2. be able to: 有能力（或辦法、機會）做某事

eg. I know someone who should be able to fix you up.
我知道有個人能提供你所需要的東西。

eg. Manufacturers must be able to juggle demands of all kinds.
制造商必須能夠應付各種需求。

3. stick with: 堅持做，繼續做

eg. It's easy to do anything if you stick with it.
如果你能堅持去做一件事，那么，就沒有做不成的事。(或：持之以恒，必定成功。)

eg. But if the tool works well, then stick with it.
但如果工具適用，那么就應該堅持用下去。