hard and fast rulehard-and-fast rule硬性: hardness; rigid; stiff; infl ...规则: rule; regulation; ordination ...硬性规定: hard rule; hard-and-fast rules弹性规则: elasticity law调节性规则: regulative rules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:硬性规则,即可在微信中查询翻译