相当多的国外研究已经证实负子对人体的好处。
A great number of studies have demonstrated that negative ions are good for health.
本文还总结了胚胎发育时期与卵粒大小的关系，讨论了负子蝽背器官解体的作用。
The relationship between the developmental stage of the embryo and the size of the egg was noticed and 'the function of the disintegrating dorsal organ discussed.
我们知道Lethocerinae科(半翅负子蝽科昆虫的一类)的大型昆虫会捕食包括鱼和蛙类在内的小型脊椎动物。
Large bugs in the Lethocerinae family have been known to prey upon small vertebrates including fish and frogs.
但我们的首相——他也是疑欧派一分子，但受到现实的重击——应当负部分责任。
But the prime minister-a Eurosceptic who has been mugged by reality-bears part of the blame.
结果表明，杂质-声子相互作用显著且声子对结合能的作用为负。
The results show that the impurity phonon interaction is important and the phonon contribution to the binding energy is negative.
方法用高灵敏度负高压人呼出气中钍射气子体收集测量系统对每名被检矿工测定其肺内钍的沉积量。
Method By using high sensitive negative voltage exhaled thoron progeny collection and measurement system, the thorium lung burdens of each dust exposed miner was obtained.
声子对总能量的贡献为负，由于声子的存在极化子争裂能较裸电子更为稳定。
Since the present of the phonons, whose energy gives negative contribution to the polaron's, the spin-splitting states of the polaron are more stable than electron's.
转化后的问题要求其乘子是非负的，故其KKT条件与一般的等式约束优化问题不同。
Therefore, its KKT conditions are different from those of the general equality constrained optimization problem.
系统地研究了声子晶体中复杂的声波负折射现象。
Negative refractions of acoustic waves in sonic crystals have been studied in details.
并利用可调谐声子晶体实现了可调谐负折射成像。
Based on the controllable refractions, moreover, the acoustic tunable superlensing effect has been observed.
上述负离子矿石是钍矿石为原材料；
利用数量曲率与第二基本形式长度之间的一个不等式关系，证明了其子流形的截面曲率一定非负(或者为正)，并将此应用到紧致子流形上，得到一些结果。
By using an inequality relation between a scalar curvature and the length of the second fundamental form, it is proved that sectional curvatures of a submanifold must be nonnegative (or positive).
给出一个正整数和负整数组成的立方体，找出其中具有最大和的子立方体。
Given a cube of positive and negative integers, find the sub-cube with the largest sum. The sum of a cube is the sum of all the elements in that cube.
在NOS1基因启动子区鉴定了两个正调控区域和两个负调控区域，同时TS A可上调不同长度启动子的转录活性。
Two positive regulation regions and two negative regulation regions were found within NOS1 promoter. TSA may up-regulate the transcription activities of NOS1 promoters of different length.
在NOS1基因启动子区鉴定了两个正调控区域和两个负调控区域，同时TS A可上调不同长度启动子的转录活性。
Two positive regulation regions and two negative regulation regions were found within NOS1 promoter. TSA may up-regulate the transcription activities of NOS1 promoters of different length.
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