1. It is known to all that Taiwan is part of Chinese territory.
众人皆知台湾是中国领土的一部分。
2. I happened to know about the matter.
我碰巧知道这件事。
3.I don't know the writer but I know of him.
我不认识作者，但我知道他。
造句: 1.look like 看起来像
The cloud over there looks like a sheep. 那边那朵云看起来像一只绵羊。
2.sound like 听起来像
It sounded like someone is running on some dry leaves. 听起来像有人在干落叶上跑。
3.smell like 闻起来像
Michelia figo smells like banana. 含笑花闻起来像香蕉。
4.taste like 尝起来像 5.feel like 感觉起来像