找警方来现场时那孩子表现得格外积极。
The child displayed great initiative in going to fetch the police.
算外积时，依第一行展开。
Right, when we do cross products, we are doing an expansion with respect to the first row.
我们还学过，外积的方向，与A和B均垂直。
We have also learned that the direction of the cross product is given by taking the direction that's perpendicular to a and b.
现在我说下外积的一个重要应用，可能你们还不知道的。
Let me just point out one important application of cross product that maybe you haven't seen yet.
中国文坛和艺坛的精英分子也定期在国内和国外积极参加国际性的文化交流活动。
The elite of the Chinese literary and artistic community regularly attend cultural gatherings at home and abroad with active international participation.
据此，可以阐明并矢正是二矢量的外积，并建立了其与张量的对应关系。
It is also shown that the dyad is just the outer product of two vectors, and the relationship between dyads and tensors can be accordingly set up.
第一章是向量代数，主要介绍向量的线性运算、向量的内积、向量的外积、向量的混合积和双重外积。
The first chapter is about vector algebra, introduces the vector of linear operations, inner product of vectors, vector outer product, vector product and double mixed exterior product.
这是我十分愿意去做的事，同时还有额外积极的公众压力——那就是你们这些读者，这两点激励着我坚持下去。
It's something I really enjoy, and there's the added bonus of positive public pressure (that's you, the readers) that has motivated me to stick with it.
胰外积液中以肾旁前间隙积液最多，有30例（占51.7%），小网膜囊积液次之，为26例（占44.8%）。
Extrapancreatic fluid collection was most commonly seen in the anterior pararenal space(30 cases, 51.7%), followed by the lesser sac(26 cases, 44.8%).
胰外积液中以肾旁前间隙积液最多，有30例（占51.7%），小网膜囊积液次之，为26例（占44.8%）。
Extrapancreatic fluid collection was most commonly seen in the anterior pararenal space(30 cases, 51.7%), followed by the lesser sac(26 cases, 44.8%).
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