释义
a. 正式的
例句
1. Business letters must always be formal, but we should write in a natural way to friends.
商业信函必须是正式的,但是写信给朋友应写得自然一些。
2. There is only a formal likeness between the two brothers, for their natures are very different.
这两兄弟仅外表相似,本性却很不一样。