您要查找的是不是：
- cold electron source 冷电子源
- The basic microscope consists of an electron source and an assembly of magnetic lenses arranged in a vertical column that is evacuated to about 10 torr or better. 基本的显微镜包括一个电子源和一块以垂直的柱形排列的磁性透镜集成板，板上排列的间隔为10托或更好。
- Electron source for carbon nanotube field emission 碳纳米管场发射电子源
- A Simplified GaAs Polarized Electron Source 自旋极化电子源装置研究
- This strain of wheat can grow during a cold spring. 这种小麦可以在寒冷的春天生长。
- In the POMA all fountain electrons emitted from the specimen (electron source) on the cylinder's ooaxis will be focused behind the specimen on the axis after travelling through 180 degrees. 其主要特点是:当一次入射束垂直入射于试样表面;激发出的次生电子以喷泉状通过弯曲的轨道绕过试样;重新会聚到试样背后的对称轴上.
- To avoid this problem, an external electron source (a negative cathode or an electron gun) injects electrons into the positive flow to electrically neutralize it, which leaves the spacecraft neutral. 为避免这个问题，必须使用外部电子源（负电极或电子枪）将电子加入正离子流，使太空船维持其电中性。
- field emission array electron source 阵列场电子发射电子源
- The girl stood shivering with cold on the doorstep. 那姑娘站在门前的台阶上,冷得直打哆嗦。
- It is neither hot nor cold in winter here. 这里冬天既不热也不冷。
- She could only croak because of her heavy cold. 她因患重感冒只能用沙哑的声音说话。
- Hot and cold are contrary terms. 热与冷是相反的词语。
- She got cold feet when asked to recite in class. 当她被叫起来在班上背诵时害怕了。
- The girl's hands were chapped by the cold. 那个女孩的手因寒冷而冻裂。
- There is still no cure for the common cold. 目前仍没有治愈感冒的良药。
- It gets cold quickly when the sun goes down. 太阳下山后天气很快就会冷下来。
- The boy was enfeebled by the cold. 那个男孩因感冒而虚弱无力。
- The cold weather antedate ed their departure. 寒冷的天气使他们提前离开。
- The Norwegians live in a comparatively cold zone. 挪威人生活在比较寒冷的地区。
- The pine trees defy severe cold. 松树不畏严寒。
