零次

The fundamental and higher-order harmonic ultrasound fields of a zeroth-order Bessel ultrasound field and focused Gaussian field in absorbing medium are computed and simulated by solving the KZK equation using a frequency domain finite difference method.

通过频域有限差分方法求解KZK方程，对吸收媒质中的零阶Bessel超声场、Gauss聚焦超声场进行计算，得到基波和高次谐波声场的数值解和仿真图，计算仿真结果验证了上述的理论结论。

By this I mean to say that his painting becomes an action, one in which we instantly have a moment of clarity and "return to zero."

在此，绘画成为一种行为，而这个行为的意义在於让我们短暂地实现一次"清空回零"。

And thus I left the Island, the Nineteenth of December, as I found by the Ship's Account, in the Year 1686, after I had been upon it eight and twenty Years, two Months, and 19 Days; being deliver'd from this second Captivity, the same Day of the Month, that I first made my Escape in the Barco-Longo, from among the Moors of Sallee.

这样，根据船上的日历，我在一六八六年十二月十九日，离开了这个海岛。我一共在岛上住了二十八年两个月零十九天。我第二次遇难而获救的这一天，恰好和我第一次从萨累的摩尔人手里坐长艇里逃出来，是同月同日。

The secondary winding can be able to withstand the power frequency test voltage of 3 kV to ground.

该型零序互感器的一次主绝缘由电缆保证，产品仅考核二次绕组的绝缘性能。

According to the transformer's equivalent circuit, the value of the current injected to the transformer's secondary winding is controlled, so that the value of transformer impedance in power system can be controlled.

本方案将变压器的一次侧串联接入电网，在电力系统正常运行时，变压器主磁通为零，故障限流器呈现很小的变压器一次侧漏阻抗，压降很小，对电力系统运行无影响。

After giving the concept and some elementary properties of subideals of Lie triple system,the author shows that every subalgebra of a nilpotent Lie triple systems is a subideal and a Lie triple system is solvable if every subalgebra is a subideal.

证明了幂零李三系的子系数都是次理想；当李三系的所有子系数都是次理想时，该李三系是可解的。

This is my first and the last time with his help -- to make direct contacts with his good hemostatic bandage affixed wounds.

这也是我第一次，也是最后一次与他的零距离接触---帮他用止血贴包扎好伤口。

The windings in the valve side adopt prolonged delta connection providing the circuit for three-multiple harmonic currents, and implementing 12-pulse converter through fit ratio; this connection between the common winding and prolonged winding can decrease the current impact when phase conversion takes place.

该换流变压器阀侧绕组采用延边三角形接线，为3倍次谐波电流提供通路；通过匝比配合，实现12脉波换流；其延边绕组与公共绕组构成自耦变压器接线，可减少换流器换向时的电流冲击；在公共绕组上连接滤波支路，并调至谐振点，配之以变压器巧妙的零阻抗设计，可以在阀侧实现无功补偿，可实现网侧绕组中无5、7、11、13次特征谐波，即谐波屏蔽。

Hurtle to press to belong to to material of cold process, the original material that use is all the plank material that has the good ductility generally, usually under the normal temperature, the material places among the molding tool, passing the output pressure function of punching machine or press machines under, make material press the shape occurrence su of the molding tool decision transform, get need of zero, parts, sometimes transform once and can't attain the request because of the material, also have the cent to hurtle to press for many times and transform gradually on the molding tool of dissimilarity, end attain to design the size request.

机械类的帮我翻译一下吧~谢谢了！冲压属对材料的冷加工，使用的原材料一般都是有良好的延展性的板材，通常在常温下，材料放置于模具间，通过冲床或压床产生的压力作用下，使材料按模具决定的形状发生塑性变形，得到所需的零、部件，有时因材料一次变形不能达到要求，也有分在不同的模具上多次冲压、逐步变形，最终达到设计尺寸要求。

SAMSON valves with metal bellows seal technology patents to prevent any toxic and flammable explosive gas emission into the atmosphere, it's designed for 2 to 5 layer structure, using a molding method, non-sub-welding, using soft-sealed Plug / Block co-ordination can be achieved within a zero leakage, and frequency of use (valve fully open to full-off) of 160 million over the same time can be loaded corrugated pipe leak detection devices, better guarantee the safety valve to protect Personal and environmental safety.

SAMSON阀门具有金属波纹管专利密封技术，防止了任何有毒及易燃爆气体散逸到大气中，它的设计为2～5层结构，采用一次成型方式，非分段焊接方式，采用软密封的阀芯/座配合，可达到零内泄漏，且使用次数在160万次以上，同时可以加载波纹管检漏装置，更能保证阀门的安全性，保护人身及环境安全。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。