She is strict in the matter of discipline. 她对纪律的要求是严格的。
Lack of education was a liability in getting a job. 缺少教育对找工作不利。
The figures in brackets are annual growth rates. 括号内的数字是按年变化率。
The rate of change of momentum of a body is proportional to the impressed force and takes place in the direction of that force. 一物体动量的变化率与外加力成正比,并与外加力的方向一致。