结论超声提取方法简单，提取率高，低耗高效。
Conclusions Ultrasonic extraction was a simple method, with high extraction efficiency.
为了达到这个目标，该委员会将支持推广高效燃料机车，增加尾气排放权交易，鼓励使用公共交通以及推行低耗能源建设。
To achieve this, the commission will back fuel-efficient vehicles, expand emissions trading, and encourage the use of public transport and low-energy construction.
同时使用高效能冷气机、雨水收集系统和低耗能照明系统可以有效减少酒店75%的二氧化碳排放量。
A combination of energy-efficient air conditioning, a rainwater harvesting system and low energy lighting can reduce a hotel's carbon footprint by 75 per cent compared to the average establishment.
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