查询词典 shields

In the presence of both A and N or BP,β-CD more effectively shields 1-BrN from quencher in aqueous solution. Greater rigidity of the complex was achieved.

因此，与β-CD∶1-BrN∶A和β-CD∶1-BrN∶N或β-CD∶1-BrN∶BP三元包络物相比，得到了更强的磷光。

It put a hole in the heat shields and the shuttle came apart on re-entry.

在热保护装置上形成一个洞，在返回时航天飞机破裂了。

The vertical shields are now lower at the front (yellow dotted line indicates previous shape) and the small horizontal fin has been extended rearwards, so as to better direct and split in two the airflow exiting from beneath the front wing.

垂直保护片前部现在更低（黄色虚线显示以前的形状），小水平翼被延伸到后方，这就能更好的疏导和分流前翼下方的气流。

The shields of the Revenant boiled and popped.

亡魂号上的护盾沸腾着消失。

Sand threshold;cusp catastrophe;critical friction velocity;Shields parameter;particle Reynold number

风沙起动；尖点突变；临界起动摩阻风速；希尔兹参数；颗粒雷诺数

Firstly, based on the force acting on a single-particle, establish a discriminant formula of the sand threshold, and prove that the sand threshold belongs to the cusp catastrophe. Then establish the basic equation of the cusp catastrophe using coordinate transformation and catastrophe theory. Finally, while particle Reynold number and equivalend diameter are the state variables and Shields parameter is the control variables, we can obtain the model of cusp catastrophe of sand threshold, putting those variables into the basic equations of the cusp catastrophe. The model is derived from the mathematics, which has a certain mathematical theory foundation.

首先从单颗沙粒受力分析出发，建立沙床沙粒起动条件判别公式，进而证明了风沙起动属于尖点型突变；然后通过坐标变换和突变理论建立了尖点突变的基本方程；最后本文选择颗粒雷诺数和等效粒径作为控制变量，希尔兹参数作为状态变量，并把它们代入尖点突变的基本方程，经过拓扑变换得到风沙起动的尖点突变模型，并与前人的公式及实验数据进行比较。

Climber Rick Ridgeway inches his way up a jagged ridge on the mountain K2; his mask shields him from cold and solar radiation

攀登者Rick Ridgeway 一步一步的登上K2山脉，他的面具使他避免严寒和紫外线辐射的伤害。

Now he faces riot police with shields and batons.

但现在他面对的是手持盾牌及警棍的喧闹警察。

Wear safety glass es with side shields, leather gloves, safety shoes, and other appropriate equipment.

穿戴带护罩的安全眼镜、皮手套、安全鞋和其它合适的装备。

The roof was poor and thatched; but in strange contrast to it there ran all along under the eaves a line of wooden shields, most gorgeously painted with chevron, bend, and saltire, and every heraldic device.

这个屋顶用茅草覆盖很破旧，但是奇怪与之鲜明对比的是位于屋檐底下的一行木构，大部分绘制了锯齿形的雕饰，x十字形和贵族的纹饰。

This matter overthrew all basises I learned from Sunday school .

这件事把我从周日学校学到的所有道理都颠覆了。

It's one of the cruel ironies of aging: if you want to remember your favorite restaurants, the less you should eat at them.

这是一个老化的残酷讽刺：如果你想记住你最喜欢的餐馆，你应该更少吃到它们。