旋二段式 rounded binary
内消旋二氢愈疮木脂酸 meso-dihydroguaiaretic acid
形成双股超螺旋二聚体 coiled-coil di-mer
自旋二极管 spin diode
内消旋二氢愈创木脂酸 meso-dihydroguaiaretic acid
二维旋转成三维 REV
二级旋转式空气压缩机 two-stage rotary air compressor ; stage rotary air compressor
三维旋转之二 DROTATE
螺旋岛二 Spiral Island II
二重螺旋线 [数] double helix
除了这些，旋度还有一个用处，如果你还记得，我们讨论平面的时候,当把线积分转换成二重积分的时候。
But another place where this comes up, if you remember what we did in the plane, curl also came up when we tried to convert line integrals into double integrals.
在殿右边当中的旁屋有门，门内有旋螺的楼梯，可以上到第二层，从第二层可以上到第三层。
The entrance to the lowest floor was on the south side of the temple; a stairway led up to the middle level and from there to the third.
如果旋度在原点有定义，你就可以试试了，计算二重积分。
So, if a curl was well defined at the origin, you would try to, then, take the double integral.
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