plane

[英]

解释:
平面;飞机

The quantities ba β are the covariant components of a plane tensor, called the curvature tensor of the surface.
baβ是“平面张量”的协变分量，叫做该曲面的曲率张量。

Travel food: what 's your go-to snack for a long day of meetings or long plane ride?
旅行食物:如果要开一天会或需要长途飞机旅行，您会准备哪些最喜欢的小食品？