即给定的向量场是以原点为心向外延伸的。
My vector field is really sticking out everywhere away from the origin.
由内向外延伸的切口，穿过外侧脚并将之分为上下两个部分。
An incision extending medial to lateral through the lateral crus separating the lateral crus into a superior and an inferior portion.
尽管石家大院没有北京的紫禁城大，但是它还是一个拥有很多房间，巨大而又向外延伸的建筑物。
Although the Shi Mansion is not as big as the Forbidden City in Beijing, it is a large, sprawling complex of many rooms.
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