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- See above, for a coplanar system of concurrent forces to be in equilibrium it is necessary and sufficient that the resultant of these forces is zero. 从前述可知：平面汇交力系平衡的必要与充分条件是该力系的合力为零。
- composition of concurrent forces 汇交力系的合成
- This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
- It is vain to attempt to root out heresy by force. 试图用暴力消除异端邪说是徒劳的。
- Napoleon conquered by the force of an iron will. 拿破仑攻无不克靠的是坚强的意志。
- Patience is a sine qua non for a good teacher. 做个优秀教师必不可少的条件是要有耐心。
- The diplomat was declared persona non grata. 这位外交家被宣布为不受欢迎的使节。
- But they refused to bow to force. 但他们拒不向武力低头。
- Application of the Projective Plane- change Method to a Spatial Concurrent Force System 换面法在求解空间汇交力系中的应用
- He is declared personal non grata and forced to leave the country. 他被宣布为不受欢迎的人而被迫离开该国。
- I had to use force in opening the door. 我不得不用力开那一扇门。
- The invasion force was annihilated. 侵略军被消灭了。
- When do the new safety rules come into force? 新的安全规则何时生效?
- The Rule of Composition and Resolution of Concurrent Forces 共点力的合成与分解法则
- The destructive force of the storm is huge. 暴风雨的破坏力是巨大的。
- non concurrentadj. 非共点的(不集中于一点的)
- Many old rules are not in force any more. 许多旧的制度都已经失效。
- I had had a few beers and was completely non compos mentis. 我喝了些啤酒就头昏脑胀了。
- Beiyang Navy is the earliest naval force of China. 北洋水师是中国最早的海军部队。
- The farm labour force is running down steadily. 农场里的劳动力在不断减少。
