Nowhere in nature is aluminium found free, owing to its alaways being combined with other elements, most commonly with oxygen. 复合介词后一定跟动名词或名词吗？《词汇》95fficeffice" />

The conveniences that Americans desire reflect not so much a leisurely lifestyle as a busy lifestyle in which even minutes of time are too valuable to be wasted.   What does this sentence mean ? 《词汇》107