组成地球上蛋白质的那20个（氨基酸）都是左旋氨基酸。
The twenty that make up the proteins on Earth are all left-handed.
此外，左旋和右旋蜗牛可能无法交配，因为它们的扭曲方向不相容。
In addition, perhaps left and right-handed snails cannot mate with each other, having incompatible twist directions.
如果左旋氨基酸占大多数的话，就说明这些氨基酸从根源上来说是具有生物性的。
A prevalence of left-handed amino acids would indicate they were biological in origin.
然而，一些卵壳中会出现反向螺旋的蜗牛，多数情况下是在左旋卵壳中，右旋的出生率惊人地高。
However, some broods possess a few snails of the opposing hand, and in predominantly sinistral broods, the incidence of dextrality is surprisingly high.
在实验中，右旋卵子的细胞质注射改变了左旋卵子的形态，但是左旋卵子的细胞质注射不会影响到右旋卵子。
In experiments, an injection of cytoplasm from dextral eggs changes the pattern of sinisterly eggs, but an injection from sinisterly eggs does not influence dextral eggs.
如果发现了氨基酸，并且它们普遍表现出同一种偏向性——要么像地球上的氨基酸一样是左旋的，要么是右旋的，那将会格外有趣。
If amino acids are found, it would be especially interesting if they show a prevalence of one type of handedness, either left, like amino acids on Earth, or right.
在实验中，用取自右旋卵子的细胞质进行的注射，可改变左旋卵子的模式；用取自左旋卵子的细胞质进行的注射却不能影响到右旋卵子。
In experiments, an injection of cytoplasm from dextral eggs changes the pattern of sinistral eggs, but an injection from sinistral eggs does not influence dextral eggs.
甲基苯丙胺以右旋和左旋两种对映体形式存在。
Methamphetamine exists as two enantiomers, dextrorotary and levorotary.
运用 L-3，4-dihydroxyphenylalanine（左旋多巴）临床治疗帕金森有其局限之处。
Treatment of Parkinson's disease with L-3,4- dihydroxyphenylalanine (L-DOPA) has its limits.
一直往左旋转旋钮更新就会暂停。
Turn the knob all the way left, and the updates will be paused.
要向左旋转，请使用负数。
第二，左旋多巴治疗和神经毒性并不相关。
Second, levodopa therapy is not associated with neurotoxicity.
他会叫他到白门面汽车修理店去拿一左旋活动扳手。
He'd send him to White Front Garage for a left-handed monkey wrench.
卫星导航会和你说话并且告诉你，比如说，向左旋转。
The sat nav speaks to you and it tells you, for example, to turn left.
目的研究自制盐酸左旋沙丁胺醇缓释片的体外释放度。
Objective To study the in vitro dissolution rate of levalbuterol hydrochloride sustained released tablets.
左旋分子就是使偏振光发生左(即逆时针方向)旋的分子。
A left-handed molecule is one that causes polarised light to rotate to the left (ie, anticlockwise).
像其他许多分子一样，氟比洛芬酯具有左旋和右旋两种形式。
Like many other molecules, flurbiprofen has a left-handed and a right-handed form.
目的：制备盐酸左旋多巴甲酯眼膏并建立其质量控制方法。
OBJECTIVE: To prepare L-dopa methyl ester hydrochloride eye ointment and establish a method for its quality control.
目的探讨左旋多巴和卡比·多巴治疗儿童弱视的临床疗效。
Objective To explore the clinical curative effect of children's amblyopia treated with levodopa and carbidopa.
这类特征中最奇异的一个就是许多构成生命的分子是左旋的。
And one of the most bizarre of these features is that a lot of the molecules of which life is made are left-handed.
左：机器人向左旋转90度，并保持原先所在的格网位置不变。
Left: the robot turns left 90 degrees and remains on the current grid point.
目的比较低浓度罗哌卡因和左旋布比卡因用于分娩镇痛的效果。
Objective To compare the analgesic effect of ropivacaine with levobupivacaine at low concentration for labor alleviating pain.
冰，对电磁波来说则是透明的，会把原来的左旋极化波反射回来。
Ice, which is transparent to radio waves, also sends back left-polarized waves.
目的观察左旋多巴对猫弱视眼模型的作用，以探讨弱视的发病机理。
Objective To observe the effects of levodopa on strabismic amblyopia model eyes in cats, and explore amblyopia pathogenesis.
在生物化学中，手性是有意义的，如左旋和右旋的物质气味可能不同。
In biochemistry, handedness can matter. Left - and right-handed versions may, for example, smell different.
结果：研究确诊了126例左旋多巴治疗至少2个月的偶发帕金森病患者。
Results: We identified 126 incident Parkinson disease patients treated with levodopa for at least 2 months.
光滑表面会反射一个反向的优选极化波，而粗糙地区的反射波是左旋极化波。
While smooth surfaces send back a reversed, right-polarized wave, rough areas return left-polarized waves.
补充左旋肉碱，帮助你的脂肪及时燃烧，会让你拥有健康、苗条，迷人的身材。
L-carnitine supplement, to help you burn fat in a timely manner, and you will have a healthy, slim, attractive figure.
试验采用了很多不同种类的口服抗氧化剂，包括维生素e、左旋肉碱、锌以及镁。
The trials explored the use of many different types of oral antioxidants, including vitamin e, L-carnitine, zinc and magnesium.
棉酚，尤其是左旋(-)棉酚，具有重要的男性抗生育、抗肿瘤、抗病毒等作用。
Gossypol, especially the (-) -gossypol, has the function of male antifertility, anti-cancer and anti-virus.
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