它不仅难于点着，而且闻起来有一股油味。
闻起来好像浓浓的油味中夹杂着强烈的酒精味和洋葱味。
It smelled like a rancid mixture of strong Onions and stronger alcohol.
像醋气味是由乙酸造成的，而指甲油味是由乙酸乙酯形成的。
A vinegary smell is caused by acetic acid, while a nail polish aroma reflects the formation of ethyl acetate.
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