If you wanna tie anchor to it and drop it right into the ocean, that's no problem, because plant fibers can stand up for months, even years, in direct contact with salt water.

如果你想把锚栓在它上面，然后直接把它扔进海里，那是没有问题的，因为植物纤维可以在直接接触海水的情况下存活数月甚至数年。

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A better suggestion would be the Pratt knot, a very easy to tie knot popularized by news anchor Don Shelby.

一个更好的建议将是普惠结，一个很容易推广领带结的新闻主播唐谢尔比。

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The steel anchor box of the tie ho arch bridge has the characteristics of carrying lug loads and fitting into a small space. This adds to the difficulties in design and production.

系杆拱桥钢钻箱，具有“承受大吨位，适应小空间”的特点，给设计和制造增加了难度。

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I tie a spring to my back and I anchor it to the wall and see how much the spring stretches before the two forces balance.

我把弹簧一端系在背后,另一端固定在墙上,观察两个力平衡时弹簧的伸长量

耶鲁公开课 - 基础物理课程节选