Seven species of birds of prey have been observed.

There are many species of dog(s).

狗有许多种。

Since the birds interbreed they cannot be classed as different species.

由于这些鸟进行杂交繁殖，不能把它们归为不同的物种。

It is a good idea to allocate a specific duty to a specific person.

责任到人是个好办法.

E . We shall send you quotations once we get your specific enquiry.

一俟收到贵方的具体询价,我们将寄上报价.

If you have any other requirements please feel free to send us your specific enquiry.

如果您有任何其他要求请送我们您的具体询问.

Samples and quotations will be immediately sent to you upon receipt of your specific enquiry.

一接到你方具体要求,样品和报价将随即送往你方.

Specific strength . The ratio of tensile strength to specific gravity for a material.

一种材料的抗拉强度与比重的比值.

Will you please tell me your fuel oil specifications and specific gravity?

请告诉我们燃油的规格和比重好 吗 ?

To make this simpler, research workers often use specific gravity instead of density.

为了简便, 研究人员常常使用比重而不使用密度.

Wait ten days and check the specific gravity.

等待十天并且检查比重.

Granted the weight and the specific gravity of a body, we can calculate its volume.

假设已知一个物体的重量和比重, 我们就能算出它的体积.

Specific gravity is the ratio of the density of a substance to the density of water.

比重是某物质的密度与水的密度之比.

Objective : To study operation, efficacy and safety of Ropivacaine in light specific gravity spinal block.

目的: 研究罗哌卡因在轻比重蛛网膜下腔阻滞的可行性 、 有效性和安全性.

Once the desired specific gravity is established, the same strength must be used henceforth.

所需的比重一经确定, 以后就必须使用同一浓度的酸.

Specific gravity of determination made according to the determination of the adhesive.

比重的测定可按有关胶粘剂测定方法进行.

The model successfully predicts the partition curve with the change of the specific gravity of separation.

并针对复合双曲正切模型,提出了一套模型参数变换公式,通过与其它多种经验模型的对比验证,证明复合双曲正切模型可以更为准确的用于重力选的预测和优化.

An instrument used to measure density or specific gravity.

人口密度比一般的少或者比期望的少.

In composition of structure of industry of our country aviation, have western quite specific gravity.

我国航空工业结构布局中, 西部占有相当比重.

It is found that the results are influenced greatly by specific heat of air.

建模过程中发现,空气定压比热对压气机性能计算有较大的影响.

The specific heat of nanocrystal approaches that of glass, but is that of bulk crystals.

纳米晶与玻璃具有相近的比热并高于正常晶粒尺寸晶体的比热.