positive writhe
collocation正拧数
A right-handed trefoil knot has a positive writhe.
右手三叶结具有正拧数。
扭动；盘绕；苦恼
拧数
The number of negative crossings subtracted from the number of positive crossings in a knot
The writhe of this knot is a simple integer that helps distinguish it from its mirror image.
这个纽结的拧数是一个简单的整数，有助于将它与其镜像区分开来。
用法提示：此处 writhe 作名词，表示纽结理论中的拧数。
To calculate the writhe, count each positive crossing as +1 and each negative crossing as −1.
要计算拧数，将每个正交叉点计为 +1，每个负交叉点计为 −1。
用法提示：writhe 在句中作名词，指计算纽结拧数时需要使用的数值。
These two diagrams have the same writhe even though they look quite different.
这两个图示虽然看起来很不相同，却有相同的拧数。
用法提示：writhe 作名词，用于说明两个纽结图拥有相同的拧数。
正拧数
A right-handed trefoil knot has a positive writhe.
右手三叶结具有正拧数。
负拧数
A left-handed trefoil knot has a negative writhe.
左手三叶结具有负拧数。
总拧数
The total writhe is calculated by adding the signs of all crossings.
总拧数通过将所有交叉点的符号相加来计算。
纽结的拧数
The writhe of a knot is the number of positive crossings minus the number of negative crossings.
纽结的拧数是正交叉数减去负交叉数。
writhe 由交叉点的正负号差值定义。
writhe 是纽结理论中描述交叉方式的量。
由多个纽结缠成的链环同样可用 writhe 描述。
在生物数学中，writhe 常与 twist 一起描述 DNA 的缠绕。
writhe 与纽结不变量有关，用于区分不同缠绕状态。
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Dictionary facts from ECDICT, WIKTIONARY, WORDNET.