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If we are to have a deeper study of the Chinese grammar, it is necessary for us to reinforce our effort in the study of Chinese dialectal grammar in which the theory and practice of"two triangles"should be adopted.

为了求得汉语语法研究的深入，我们有必要加强汉语方言语法的研究。方言语法的研究也应该采用两个"三角"的思路和方法。

The entanglement of formation and the Peres condition have good correspondence, and if the mixed-state deviates the similar pure state slightly, its maximum entanglement drops suddenly. The conclusion of the entanglement of the infinite dimension mixed-state in J-C model never losing is demonstrated besides finding the necessary condition of disentanglement of the finite dimension mixed-state in J-C model.

通过研究有限维混合态光场与二能级原子相互作用系统中的纠缠，发现形成纠缠理论与Peres判据有着良好的对应，同时看到偏离纯态很小的混合态，其最大纠缠度急剧减小；找到了有限维混合态J-C模型在演化过程中出现消纠缠的必要条件，论证了在无限维情况总存在纠缠的结论。

It is necessary to do more exercise if you want to learn English well.

要学好英语，大量的练习是必要的。

This necessary docility is in the long run, a wholesome physic, because, if our apprentice has any gallantry of spirit, it will arouse in him an exhilarating irritation, that indignation which is said to be the forerunner of creation.

从长远来说，这种顺从是有益的心态，如果我们的学徒有点血性的话，他就会感到狂躁，据说这种狂躁就是创作的前兆。

If we take a broad view of the present situation about our legacy inheritance and property donation and combine the successful experience at home and abroad, It is necessary to impose the legacy and donative tax.

随着经济体制改革的深入，我国公民的财产状况日益复杂，遗产范围、赠与范围逐渐扩大，财产价值日益增强。

If you want your children to keep down-to-earth, it ' s necessary to share some responsibilities on them.

你若希望你的孩子总是脚踏实地，就要让他们负些责任。

However, if you're eating at a downscale restaurant a tip is not necessary.

不过，如果你在一家低档次的餐馆就餐，就没有必要给小费。

However, if you're eating at a downscale restanrant a tip is not necessary.

不过，如果你在一家低档次的餐馆就餐，就没有必要给小费。

However, if youre eating at a downscale restaurant a tip is not necessary.

不过，如果你在一家低档次的餐馆就餐，就没有必要给小费。

What you're doing is creating the energy necessary to draw a person into your life, if that's what you choose.

你正在做的是创造能源必须提请一个人进入您的生活，如果这就是你的选择。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。