評(píng)論
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1.They need a lot of helium, fully blown up, the ballon will be 2 to 3 meters in diameter.
blow up 爆發(fā)，爆炸；放大；使充氣
Other than blowing up a tyre I hadn't done any car maintenance.
除了給一個(gè)輪胎充氣外，我沒(méi)有做過(guò)任何汽車保養(yǎng)。
He was jailed for 45 years for trying to blow up a plane.
他因圖謀炸飛機(jī)而被監(jiān)禁了45年。
2.High up in what is called the stratosphere, the ozone layer keeps harmful ultraviolet radiation from reaching the earth.
keep from 隱瞞；阻止；抑制
The turkey is basted to keep it from drying out.
烤火雞時(shí)潤(rùn)以油脂以免烤干。
Cover the food with a bowl to keep it from getting cold.
用碗把菜扣上，免得涼了。
