oil tar的用法和樣例：
例句
- This kind of tobacco has a high tar content.
這種香煙焦油含量很高。 - Tar is much used in making modern roads.
修建現代公路多用焦油瀝青。 - Tar is a binder for gravel in paving.
在鋪路時(shí)柏油用來(lái)黏結礫石。 - The road is so new that one can smell tar.
這條路新得都能聞到柏油的氣味。 - A pitch mesophase can be prepared from petroleum pitch andcoal tar pitch.
從石油瀝青和煤瀝青中制取瀝青中間相物質(zhì)。
