全部

1·The closed line forms the outer edge of the surface.

封闭线构成了表面的外缘。

2·An electric line of force is also a closed line; it too forms a loop and returns on itself.

电力线也是一条封闭线；它形成一个圈，返回原处。

3·If we have a closed curve then the line integral for work is just zero.

如果给定一条封闭曲线，那么求所做功的线积分为零。

4·To model inheritance on a class diagram, a solid line is drawn from the child class (the class inheriting the behavior) with a closed, unfilled arrowhead (or triangle) pointing to the super class.

为了在一个类图上建模继承，从子类(要继承行为的类)拉出一条闭合的，单键头(或三角形)的实线指向超类。

5·The flooding also affected the NATO supply line to Afghanistan, when part of the submerged route was closed to traffic.

洪水也影响到北约(NATO)对阿富汗的供给线，因为有些被水淹没的道路已经关闭。

6·And, I still want to compute the line integral along a closed curve.

但仍然想要沿着封闭曲线的线积分计算。

7·As shown in Figure 10, a dotted line with a closed, unfilled arrow means realization (or implementation); as we saw in Figure 4, a solid arrow line with a closed, unfilled arrow means inheritance.

如图10所示，一条带有闭合的单向箭头的点线意味着实现(或实施)；正如我们在图4中所见到的，一条带有闭合单向箭头的实线表示继承。

8·OK, so if I give you a curve that's not closed, and I tell you, well, compute the line integral, then you have to do it by hand.

如果给你们一条非封闭曲线，然后让你们计算线积分，你们必须动手一点点来计算。

9·To compute things, Green's theorem, let's just compute, well, let us forget, sorry, find the value of a line integral along the closed curve by reducing it to double integral.

用格林公式计算…，只是计算…，让我们忘记…，应该是，算沿闭曲线的线积分值，可以通过二重积分来算。

10·Here there was no line of giants to push her through; this gate was closed and bolted, and a guard looking wide-awake stood by it.

这儿没有推着她前进的巨人队伍了，大门是关着的，而且上了栓，门卫站在门边很警醒地看着。