Bicycloocatane
[機] 二環辛烷
??? 情景例句
Me, neither.
我也沒有過。
Children enter primary school at the age of 7.
孩子們7歲進小學。
I went on walking, bending down because the roof of the cave was not very high.
因為洞頂不是很高，我繼續彎著腰往前走。