•Play havoc with (sb/sth) (idiom) -

To cause issues or disruptions for someone or something.（使…陷入混乱）

Examples:　　

1.The road closures have played havoc with rush-hour traffic.　　

2.This humidity is going to play havoc with my hair.

•Out of control (idiom) - Impossible to manage or to control.（失控）

Examples:　　

1.The fire is burning out of control.　　

2.A truck ran out of control on the hill.

•Amount to sth (phrasal verb) -

If figures, sums etc. amount to a particular total, they equal that total when they are added together.

Examples:　　

1.The number of people taking part amounted to no more than a few hundred.　　

2.Their annual fuel bills amounted to over £6,000.

•Nibble (away) at sth (phrasal verb) -

To make (something) disappear or go away very slowly.（蚕食，一点一点地消耗）

Examples:　　

1.The waves nibbled away at the base of the cliff, year after year.　　

2.The mice nibbled away at the huge wheel of cheese.

•Be/Come on the scene (idiom) -

To start to exist or to get involved in a situation or activity.（出现，登场）

Examples:　　

1.Since computers came on the scene, the world has changed greatly.　　

2.We were enjoying ourselves till she came on the scene.