由于近似基本解在边界上发散，必须将区域扩大。

Since the approximating fundamental solution is infinite on boundary, we must extend the field.

youdao

为了减少波在边界上的反射，顶部边界采用了海绵边界条件。

In order to decrease the reflection of wave on the boundary, spongy condition was used on top boundary.

youdao

最好能搭车赶路，以免到了最后一天在边界上被罚，弄不好连自行车也被扣了。

Better to hitch a lift now and get some of the miles out of the way than to wait until the last day and risk being fined at the border, or even have my bike impounded.

youdao

for instance, for the thermos with the coffee in if you place the boundary in the inside wall of the glass or the outside wall of the glass and the inside of the thermos, that makes a difference; different heat capacity, etcetera.

比如说，对于装咖啡的热水瓶来说,你把边界设置在瓶胆的内壁上,或者设置在瓶胆外壁上,或设在热水瓶里面，情况都是不一样的;,有不同的热容等等。

麻省理工公开课 - 热力学与动力学课程节选

You've got to place the boundary at exactly the right place, otherwise you've got a bit too much in your system or a bit too little.

你要把边界,设置在正确的位置上，否则你的系统就会要么多出一部分,要么少一部分。

麻省理工公开课 - 热力学与动力学课程节选

Milton's performing a similar boundary-crossing aesthetic gesture here.

弥尔顿在他的作品中也展现了这种美学上的边界交叉。

耶鲁公开课 - 弥尔顿课程节选