We managed to tack down the stairway carpet.
我们设法将楼梯地毯固定住。
You'd better just tack down the edge of the carpet, people keep tripping over it.
你最好把地毯边钉住，人们老在上面绊脚。
As the Cape of Good Hope falls astern, the racing yachts tack down towards the 40th parallel.
在驶过好望角之后，比赛帆船将抢风驶向第40条平行线。
To determine the catenary curves of arches, he would tack a sketch of a foundation plan on the ceiling, hang loops of string, and attach weights along the loops in proportion to down forces.
为了确定拱顶的链状曲线，他会用大头针将基座草稿钉到天花板上，吊上几圈绳子，在绳子上加重，与向下的力相符。
请用平头钉钉住地毯。
请用平头钉钉住地毯。
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