我们很不愿意踏上如此漫长艰辛的回家之路。We were reluctant to start the long trudge home.即使在年景最好的时候，务农为生也是相当艰辛的。Living off the land was hard enough at the best of times.穿越森林的探险充满着艰辛和危险.The expedition through the jungle was fraught with diffi...
探讨一种喷气织机四连杆打纬机构的动平衡方法.The dynamical balancing of beating up mechanism of air - jet loom is discussed.喷气织机打纬机构广泛采用瓦特型六 连杆机构.The Watt six - bar mechanism has been widely adopted as the beating up mechanism of air - jet loo...
an act of unprovoked aggression无端的侵犯行为Stephen was stabbed to death in an unprovoked attack nearly five months ago.斯蒂芬在近5个月前无故遭到袭击，被捅死了。Her angry outburst was totally unprovoked.她的暴跳如雷完全是无理取闹。...