Snag is slightly informal. In written English, people usually prefer to use problem or disadvantage instead: 略为不正式。在书面英语中,人们一般更喜欢说 problem 或 disadvantage
The only disadvantage is that it takes a little longer.
唯一的不足之处是时间长了一点。
2.a part of a dead tree that sticks out, especially one that is under water and can be dangerous 〔死树伸出水面的〕残桩;〔尤指水下死树的〕暗桩
3.a sharp part of something that sticks out and holds or cuts things that touch it 尖突部分