semicircle

英[ˈsemisɜːkl]美[ˈsemisɜːrkl] ^[1] 

navigable semicircle[氣象]可航半圓

depressed semicircle扁半圓

semicircle key半圓鍵 ^[1] 

This is not the shape of semicircle of nutritious health problems?

沒有這半圓的形狀的人的健康有營養問題嗎？

It is also found that the ion streams produced by semicircle and sawtooth plasma aerodynamic actuator have very damage effects to insulation materials.

實驗中還發現，半圓、鋸齒等離子體氣動激勵器放電時離子流對絕緣材料有很強的破壞作用。

But when the sun, the South there is a semicircle .

可是豔陽的時候，南方出現了一個半圓形。 ^[1]