1.开篇表达

I think it's fair to say that there are a few negative aspects.

I'm sure most people would agree that there are some drawbacks.

Of course there are a couple of shortcomings.

2.介绍第一个缺点

I guess the most impractical characteristic would be that the balance

between work and the rest of your life is difficult to manage if self-employed.

I suppose the most unfavourable quality might be that you have to

wait for a long time if you choose to take public transportation.

Unquestionably,the most adverse feature would be that you don't

have so many career opportunities in small cities.

3.进一步解释一个缺点

Most people would agree that this is problematic because you don't

have much time to spend with your family.

This is an obvious weakness because there are not many companies in

small cities.

This is a clear limitation because you often need to get somewhere as

soon as possible.

4描述第二个缺点

Correspondingly,an additional weak point may be that income in

self-employment is likely to be irregular.

Supplementary to this,a further handicap may be that fast food can

Make people fatter.

At the same time,another stumbling block might be that excessively

large numbers of people working in a single gigantic building overburdens

public transportation。