though proper to

• v. 认为 ... 是适当的

though proper to的用法和样例：

例句

用作动词 (v.)

1. Night is the proper time to sleep.
   夜晚是适当的睡觉时间。
2. It is useful to classify all these particles into two groups.
   把所有粒子分成两大类是适当的。