by himself

英 [baɪ hɪm'self] 美 [baɪ hɪm'self]

• 单独； 独力地（完成某事）

by himself的用法和样例：

例句

1. A vowel can form a syllable by itself.
   元音能单独构成音节。
2. Li Lan seldom goes out by herself.
   李兰很少自己单独出门。