smooth plane

同根派生

But for the smooth plane,rockwool board is a good choice.
巖棉板則多用于平面度較大的表面。
But it is also demeaning for it to stay on such a soulless and smooth plane of legalism as is the case in yours.
但是，如果像你們的社會(huì)那樣停留在這種沒(méi)有靈魂、一成不變的平淡慣性狀態(tài)也是有辱人格的。
The plane climbed until it was clear of the clouds.
飛機(jī)爬升穿出了云層。
The flier is flying a new-type jet plane on trial.
飛行員正在駕駛一架新式噴氣機(jī)作試驗(yàn)飛行。
It took him long time to smooth away perplexities.
他花了好長(zhǎng)時(shí)間才消除了困惑。