bound一定: fixed; established; regular的: 4次方是 The fourth power of 2 i ...必然: inevitable; certain; necessa ...受: receive; accept约束: keep within bounds; restrain ...下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:一定的，必然的；受约束的，有义务的，即可在微信中查询翻译
