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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？
