start on something的用法和樣例：
例句
- I would not know where to start doing it.
我不知道從哪里著(zhù)手做起。 - We had many problems to surmount before we could start the project.
我們得克服許多困難才能著(zhù)手做這項工作。 - She was lonely at the very start.
她開(kāi)始時(shí)感到孤獨。 - After a promising start, things began to turn sour.
起先是很有希望的，后來(lái)卻開(kāi)始變得讓人掃興。
