Hemihedry
半對(duì)稱(chēng); 半面體
??? 情景例句
What did you do?
那你怎么辦呢？
It is the first step that costs.
萬(wàn)事開(kāi)頭難。
I went on walking, bending down because the roof of the cave was not very high.
因?yàn)槎错敳皇呛芨撸依^續(xù)彎著腰往前走。