查询词典 difficult breathing

Ram jet : Air-breathing jet engine that operates with no major moving parts.

冲压式喷射发动机：工作时没有重要运动部件的一种喷射发动机。

These air-breathing organisms are not dependent on high and are generally pollution tolerant, and can therefore live easily in water of poor quality

对污染物敏感的微生物仅见于急速流动的冰凉的溪水中，因为溪水中污染物很少，溶解氧较高。

The calculation shows that with air-breathing propulsion, the maximum velocity is limited.

计算分析发现：空气呼吸模式推进飞行器的最大速度有限；烧蚀模式可以使飞行器产生很高的速度，提高冲量耦合系数和比冲，有利于提高飞行器的最高速度；两种模式相结合的推进方式提高了有效载荷比，但能源利用效率比烧蚀模式要低。

A new type direct methanol fuel cell, the tubular air-breathing DMFC has been presented and manufactured.

制备了一种新型的直接甲醇燃料电池，即管状空气自呼吸直接甲醇燃料电池，采用弯曲热压法制备出管状膜电极。

Keywords: Micro Power Source; Fuel Cell; MEMS; Model; air-breathing

中文关键词：微能源；燃料电池；MEMS；模型；自吸氧

Boron is a kind of fuel obstinately searched for high-performance air-breathing solid rocket/ramjet engine and ramjet engine.

硼是高性能吸气式的固体火箭冲压发动机和冲压发动机瞩目追求的燃料，80年代常规固体火箭动力方面对硼燃料也表现了浓厚的兴趣。

Air-breathing hypersonic vehicle has been the next generation single stage to orbit vehicle and hypersonic cruise vehicle.

吸气式高超声速飞行器是下一代单级入轨和高超声速巡航研究的重点飞行器。

Research on the Performances of Air-Breathing Mode Propulsion by Narrow Laser Pulses .

石磊。 大气呼吸模式窄脉冲激光推进性能研究。

The invention uses the internal current collection mode, allowing the air-breathing fuel cells to reduce the resistance of membrane electrodes and enhancing the performance of membrane electrodes.

本发明采用内集流的方式，使自呼吸式燃料电池降低了膜电极的电阻，提高了膜电极的性能。

Two pens are driven by air-filled tubes placed around a subject's chest and stomach to record breathing movements.

有两支测试笔是用来记录呼吸情况的，它们由放在被测试者胸部和腹部的充了气的管子所驱动。

There are two types of gold deposits in this area, namely altered rock type and quartz vein type.

本区金矿床包括两种类型：柴胡栏子金矿床为蚀变岩型金矿；莲花山和红花沟金矿床属石英脉型。

You were home and it was two weeks ago.

你回到了家里。当时是两周前。