| 单词 | 左旋 |
| 释义 | 〔sinistrorse〕Growing upward in a spiral that turns from right to left:左旋的：从右往左呈螺旋状上升的：〔levorotatory〕Turning or rotating the plane of polarization of light to the left, or counterclockwise.左旋的：光的偏振面向左方向或逆时针方向转动或旋转的〔Norplant〕A trademark used for the drug levonorgestrel.诺普朗特：左旋去黄体酮乙基、乙基炔诺酮药剂的商标〔racemic〕Of or relating to a chemical compound that contains equal quantities of dextrorotatory and levorotatory forms and therefore does not rotate the plane of incident polarized light.外消旋的：属于或关于一种化合物的，该化合物由等量的左旋和右旋形式组成，因而对偏振光平面不旋光〔sinistrorse〕a sinistrorse vine.左旋上升的葡萄藤〔levonorgestrel〕The levorotatory form of norgestrel, used in oral contraceptives and in contraceptives implanted subdermally. In implant form it can prevent pregnancy for up to five years.诺普兰避孕剂，左旋去黄体酮乙基，乙基炔诺酮：炔诺孕酮的左旋偏光形式，用于口服避孕药和皮下植入避孕。植入避孕方式可避免五年内怀孕 |
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