... v But what the lad said jarred Paul all the way down to his heels. 但是小男孩接下来说的话却完全出乎了保罗的意料。 ◆ to one's heel 到某人脚后跟。在此用来形容保罗对这个小男孩的话 大为惊讶。 It's no simple matter to bring a break-away region of several millions to heel. ...
... C 点处圆柱形铰链约束、D 点处固定铰 链支座约束,画出分离体图。由光滑铰链约束的性质知道,其约束反力其实就是 一个力,只不过在通常情况下方向和大小不能事先确定,但是对 DC 杆而言,D、 C 分别为铰链约束,也就是说只在 D、C 处分别受一个约束反力作用,根据二力平 衡原理,两个力必定等值、反向、共线,所以可以判断出两点处的约束反力必须 共线(方向可假定),且有 F SD =F SC ,DC ...
... The Constitution also grants Congress the power to establish courts inferior to the Supreme Court, and to that end Congress has established the United States district courts, which t[r] ...