emision
n.(光、热等的)散发、发射,喷射(release, discharge)
inorganic
adj.无生物的,无机的
litter
n.垃圾
nuisance
n.令人讨厌的东西(past)
radioactive
adj.放射性的,有辐射能的
sewage
n.下水道;污水
conservation
n.保护
There is a need for the conservation of trees, or there will soon be no forests.
有必要保护树木,否则地球上的森林很快就没了。
renewable
adj.能再生的
We could better protect our environment through discovering and using renewable energy.
通过发现和使用再生能源,我们可以更好地保护我们的环境。
atmosphere
n.大气,空气
forestation
n.造林
desertification
n.沙漠化
preservation
n.保存
The old building is in good preservation.
古建筑保存完好。
reservoir
n.水库,蓄水池
This reservoir gives water to the whole city.
这个水库为整个城市供水。
oasis
n.(沙漠中)绿洲;舒适的地方