不纯

E.g. Pure natural gas is odorless and would not be noticed if it leaked out.

纯的天然气是无味的，如果泄漏的话，不会被发觉。

The photo must: have a pure white background, off-white background is not acceptable.

相片必须有纯白色的背景，米色背景是不接受的。

Have a pure white background, off-white background is not acceptable

照片的底色必须是纯白色，非白色的底色是不能接受的

For over 20 years to provide their babies with pure, organically-grown food without refined sugars, salt and processed additives.

20多年来提供婴儿纯的，不含精制糖，盐和加工添加剂的有机种植食品。

Kinetic equations of multibody systems with scleronomic constraint s are projected along the feasible and unfeasible directons of the constiaints respectively,and generalized accelerations of the systems are decomposed along the two directons using the bases of constraint matrix and its orthocomplement.

通过约束矩阵及其正交补的两组基，将定常约束多体系统的动力学方程沿与约束相容和不相容的两个方向上投影，并将系统的广义加速度沿这两个方向进行分解，得到描述系统运动的纯微分方程和求约束力的公式，同时提出了违约修正的一种方法。

Self-incompatibility is a widespread mechanism in flowering plants that prevents self-fertilization and promotes outcrossing. It has great influence on maintenance of germplasm purification and increasing in seed yield.

自交不亲和性在十字花科植物中广泛存在，其对种质的保纯及产量的进一步提高造成了较大的影响。

The detection limit was 10 times better than the conventional SPME method. Under the optimized analytical conditions, aqueous samples of trichloroethylene/perchloroethylene (20 μg/L) and benzene/toluene (10 μg/L) were analyzed. The δ13C fractionation compared to pure-phase and headspace analysis was less than 0.5‰.

在优化的条件下，对20 μg/L的三氯乙烯/四氯乙烯和10 μg/L的苯/甲苯水溶液进行了单体碳同位素分析，相比于纯溶剂碳同位素值，顶空同位素分析误差不超过0.5‰，而样本标准偏差为0.3‰。

"Practice" is not a purely physical act of production and labor.

"实践"不是一种纯自然的本能活动和行为。

The only definite sexual events that I can remember as having occurred before my thirteenth birthday (that is, before I first saw my little Annabel) were: a solemn, decorous and purely theoretical talk about pubertal surprises in the rose garden of the school with an American kid, the son of a then celebrated motion-picture actress whom he seldom saw in the three-dimensional world; and some interesting reactions on the part of my organism to certain photographs, pearl and umbra, with infinitely soft partings, in Pichon's sumptuous Le Beauté Humaine that that I had filched from under a mountain of marble-bound Graphics in the hotel library.

我有记忆的，十三岁生日之前（也就是在认识安娜贝尔之前）有关性方面的事件仅有如下：在学校的玫瑰园与一个美国男孩进行的一次严肃而有分寸的关于青春期反应的纯理论的讨论——那个男孩的母亲是一位当时极其著名的电影演员，他们之间的交流常常不是在三维世界进行的（引申义：只有书信，电话等间接交流，译者注）；还有就是，我从旅馆图书馆中成堆的装订成册的《图形学》底下偷出来皮雄的那本装帧精美的《人性之美》中的有些照片、"珍珠"和有着柔和裂缝的影子引起过我的某些器官的有趣反应。

The breed is commonly referred to as being of piebald markings.

此一品种为中型体型，具有白底黑斑点的外观，黑斑点的边缘还会有较浅的环状色素沉积，外面覆以白色毛发，所以由此能够发现其黑色毛发不像纯黑色品种那样的强烈呈现其色泽，或是其黑斑点也没有其他黑斑点品种那样明显，因此让此一品种特别出现这样的皮毛特色，比利华品种一般都认为其具有这种杂斑印记，另外，其具有竖耳的外观。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。