... principal fiber bundle ==> 主纤维丛 principal floor ==> 主层楼面 principal focal distance ==> 主焦距 ...
双语例句
1
The principalfloor is for everyday functions.
地板的主要是日常职能。
2
In the principal room, a grey carpet was removed to reveal the original pine floor.
在主房间里，一块灰色的地毯被挪开了，使原有的松木地板露了出来。
《柯林斯英汉双解大词典》
3
Because the majority of the bedrooms are on the lower levels, the architects aligned the second floor so that the principal Spaces take in the best views.