72. essential to / for ... ……必不可少
Vocabulary is essential to language.
词汇对语言学习必不可少。
Law is essential for maintaining social stability.
法律对维护社会稳定必不可少。
Air is essential to human beings.
空气对人类来说必不可少。
Vocabulary is essential to language.
词汇对语言学习必不可少。
Law is essential for maintaining social stability.
法律对维护社会稳定必不可少。
Air is essential to human beings.
空气对人类来说必不可少。