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- 在这些高的地方很难呼吸。
It is difficult to breathe at these altitudes.
- 医生叫我吸气然後（再）慢慢地呼出。
The doctor told me to breathe in and then breathe out (again) slowly.
- 蚊子会吸我们的血。更糟的是，它会把毒注入我们的体内。
The mosquito will suck our blood. What's even worse, it will inject poison into our bodies.
- 苍蝇的脚借吸力可附着于物体表面上。
Flies' feet stick to surfaces by suction.
- 蚊子喜好吸人和动物的血。
Mosquitoes like to suck the blood of people and animals.
- 有些泵和所有真空吸尘器都是借吸力工作的。
Some pumps and all vacuum cleaners work by suction.
- 水蛭是一种小型吸血虫，通常生活在水中。
A leech is a small blood-sucking worm and usually lives in water.
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