好处和坏处可以用advantage, disadvantage,还有benefit, drawback。当然还有更直白的 positive/ negative aspect。在写作的时候连成句子,可以用以下几个常见的:One/ A further/ An additional major advantage of... is... 一个/另一个主要好处是;或者The main/ most serious/ Another disadvantage/ drawback of... is 主要/最严重/另一个坏处是。此外,在实际写作的时候,好处和坏处之间最好用一些连接词,比如however, in contrast等等,提高文章整体的逻辑连贯性
Riding a bike is good for environment. It's a good exercise. We can breathe fresh air when riding on fine days. It can also save us time when there's traffic jam. We have more freedom to where we want to go, even the narrow lanes cars cannot get in. But it's slower than taking a car or taxi. When it rains, it's inconvenient for riding. And sometimes, the bike may break down suddenly, like the brake cannot work or something.