Birch tar(oil)
[化] 樺木焦油
?? 詞語組成解析
birch
[b?:t?]
n. 樺樹，樺木;（鞭打用的）樺條;
vt. （用樺條）抽打，鞭撻;
??? 情景例句
He's just fooling around.
他用情不專。
How often did I tell you to speak clearly?
我告訴你多少次要講清楚?
Can you tell me why?
能告訴我什么原因嗎？