The studio estimates its Concave Roof system could help the school collect up to 28 cubic metres of rainwater, which would contribute to its running.

工作室估计该凹屋顶系统可以为学校收集高达28立方米的雨水，这将有助于学校的运行。

youdao

Of if is concave up on one side of and concave down on the other side.

点，如果在点的一侧是凹的，而在的另一侧是凸的。

youdao

Firstly, a telescope system is made up with a concave lens and a long-focus convex lens, by which the angle of the parallel beam from the collimator can be change.

该方法借助一个焦距较长的凸透镜与被测凹透镜组成无焦系统，可以使准直管出射光束的张角发生改变；

youdao

Mr Giles's solution to the drag problem is a sharp bow that cuts through waves up to 40 feet high, and a concave hull bottom.

ECONOMIST: Fast container ships