semicircles的读音 semicircles中文意思

读音 
n. 半圆形,半圆形的周长,半圆形的东西( semicircle的名词复数 )
semicircles 用法和例句
The mirrors are placed in concentric semicircles facing a tower , on top of which the boiler and the turbine sit .
这些镜子放在面向塔的同心半圆上,塔上就是锅炉和涡轮。
It is only recently that researchers have started looking at the strange squiggles , semicircles , lines and zigzags that surround them .
只有到了现在,研究人员才刚刚开始观察石壁上那些奇怪的胡乱书写的文字、半圆图形、线条和锯齿形。
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