And don't be embarrassed if it happens to you, he adds. Even professors of dentistry and experts in the field of bad breath sometimes have malodorous mouths.
如果这发生在你身上也不用窘迫，甚至牙科专家及教授也会有难闻的口臭。
3
Some emphases on further research are indicated, such as the mechanism of removing amine and ether from malodorous gas and the optimisation of extracting process.