conservation ·noun (NOT WASTE)
Definition: when you are careful not to waste energy, water, etc. Level: C1
我们的首要任务必须是保护我们宝贵的水资源。
Our top priority must be ___conservation of our precious water resources.
对节能日益增长的关注正在推动许多行业的创新。
The growing focus on energy ___conservation is driving innovation across many industries.
公众对古老森林保护的意识达到了历史最高水平。
Public awareness about the ___conservation of ancient forests is at an all-time high.