左旋

Those that rotate light in the opposite direction are called levorotatory or optical isomers. The symbols d- and l-, formerly used to indicate dextro- and levorotatory isomers, are no longer sanctioned owing to confusion with D- and L-, which refer to configuration relative to D-glyceraldehyde.

其符号d-和 l-，原先是用来表示右旋的和左旋的异构体，现在由于容易与D-和L-混淆而不再使用，这两个符号涉及与D-甘油醛相关的结构）。

Consistent with the rift of the Eurasian plate and the northwestward spread of the Pacific plate, the stress field from large scale of mantle convection displays a skeleton of dumbbell shaped with sinistral compresso-shear at the north, dextral compresso-shear at the south and slip in the middle. Energy converge strong at the south is attributed to the northward movement of the Indian ocean.

反映欧亚板块东南向蠕散、太平洋板块北西向扩张的大尺度地幔流应力场，展现出北端左旋压扭、南端右旋压扭和中间滑移的哑铃状构造动力格局，南强北弱的能量汇聚与印度洋板块北向推挤有关。

Consequently, there exists no difference between the propagation constants of these waves, the rotation of plane of polarization is absent when a linearly polarize...

我们得出结论：这种波导可用来制作极化不灵敏移相器；而文献〔3、7〕中的结果(在这种波导中，右旋和左旋圆极化波的传播常数不相等；当线极化波通过它时出现极化面的旋转)是有问题的。

It bears the name of Swastika when the limbs are bent towards the right, and Suavastika when they are turned to the left.

当它的旋翼弯向右的时候，就具有了纳粹党所用的十字记号的名称，而当它左旋的时候，就是Suavastika。

The biofouling in this area reflected distinct characteristics of subtropical harbors. A total of 82 fouling organism species were recorded, among which Balanus reticulates, Dexiosprira foraminosus, Spirorbis papillatus, Bugula neritina, Membranipora grandicella, Styela canopus, Electra tenella, Perna viridis and Dendostrea crenulifera were dominant species.

调查记录污损生物共82种，其中优势种为网纹藤壶Balanus reticulatus、有孔右旋虫Dexiosprira foraminosus、左旋虫Spirorbis papillatus、多室草苔虫Bugula neritina、大室膜孔苔虫Membranipora grandicella、美丽琥珀苔虫Electra tenella、缘齿牡蛎Dendostrea crenulifera、冠瘤海鞘Styela canopus和翡翠贻贝Perna viridis。

It is found that the characteristic equations for right hand and left hand circularly polarized waves are identical.

在这种波导中，右旋和左旋圆极化波的特征方程是相同的，因此，它们的传播常数也是一样的；而当线极化波通过这种波导时，不出现极化面的旋转。

Based on field investigations of fault activity in the project region of the first stage of the west line of Water Diversion Project from South to North of China,following viewpoints are presented.(1) The NW directional faults mainly twist laevogyrately,and the SN directional ones are well developed and twist dextrorsely.

：基于对南水北调西线一期工程区活动断层及其工程效应和遥感解译的2次现场考察工作，提出如下初步认识：(1)工程区NW向断层的活动方式以左旋走滑为主；近SN向的横向断层较为发育，并多为右旋运动。

Based on the field study of fault outcrops and landform deformations ,combining with TL and 14C ages,it is concluded that the north marginal fault of the Yumu mountain is a thrust with left-lateral slipping and the east marginal fault is a thrust with right-lateral slipping,and the Yumu Mountain developed from the resulting uplifting of the Yumu Mountain block along these faults.

根据野外断层露头和地貌体的变形测量和分析，本文认为榆木山北缘断层是一条具有左旋位移的逆断层，东缘断层是一条具有右旋位移的逆断层，这两条断层在全新世期间都有明显的活动。榆木山的发育是沿着北缘断层和东缘断层的逆活动，造成山体内地块叠加变形的结果。

One is calcium lactate, L-or D more than in the main, the effect almost.

一类是乳酸钙，多以左旋或右旋为主，效果差不多。

Pliocene-Quaternary faulting in grabens around the Ordos block displays predominantly normaldip slip displacements with a right-lateral or left-lateral slip component,indicating a NW-trending extension.

鄂尔多斯周缘地堑系上新世～第四纪的断裂作用表征为以正向倾滑活动为主，同时具有右旋或左旋走滑分量的运动型式，指示了NW-SE向地壳引张作用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。