He kept in touch with us while he was on vacation.他在度假期间仍与我们保持联系.Bob and his family are on vacation; they've gone to Hawaii.鲍勃和他全家在度假, 他们去夏威夷了.I like fishing for perch on vacation.我喜欢在假期中钓鲈鱼....
在公共场所所有的狗必须用皮带牵住。All dogs must be kept on a leash in public places.用皮带抽他一顿!Give him a belting.在公共场所所有的狗都应该用皮带牵住。All dogs in public places should be on a leash....
Distribution and transfusion of the geostatic pressure variate in company with mining space in underground mining.地下开采中地压分布与转移随开采空间变动而变动,不同的开采顺序会带来不同的围岩稳定性....