Hurl abuse/insults/accusations…(at sb) (phrase)

●To shout at someone in a very loud and angry way.

　　（破口大駡，辱駡）

Examples:　　

1.There is not much to be achieved by hurling insults.　　

2.The fans began hurling abuse at each other.

To begin with (idiom)

●You use to begin with when you are talking about the first stage of a situation, event, or process.

　　（一開始，本來，原先）

Examples:　　

1.It was great to begin with but now it's difficult.　　

2.How did you get involved to begin with?　　

Swear word (noun)

●A rude or offensive word.（髒話，粗口）

Examples:　　

1.All swear words, even mild ones such as "damn", were deleted from the text.　　2.I'd never heard a swear word in my life.

One bad/rotten apple spoils the (whole) barrel (idiom)

●It only takes one person, thing, element, etc., to ruin the entire group, situation, project, etc.

　　（一粒老鼠屎，壞了一鍋粥）

Examples:　　

1.One rotten apple spoils the barrel. You're setting a very bad example.　　

2.I really loved my job, but there was this one jerk there who made life miserable for everyone. One bad apple spoils the whole barrel, unfortunately.

Be (as) plain as the nose on one's face (idiom)

●To be very obvious.（一清二楚，顯而易見）

Examples:　　

1.He's not happy here - that's as plain as the nose on your face.　　

2.In the end, the solution was as plain as the nose on my face.