- a snake in the grassn.潜伏的危险;暗敌;
- break in onv.打断，打扰;
- beam with overhangs悬臂梁;
- be very useful at精通;
- be busy in忙于;
- be blessed with在…方面有福气，幸运地享有;
- be available to可被..利用或得到的;
- be anxious to急于，渴望;
- be in the wrongv.错误，理亏;理亏心怯;
- be in effect正在实行;
- be expecting怀孕了;有孕;有喜;身怀六甲;
- be skilled in擅长…;
- be serious about对…是认真的，认真对待;
- be related to与。。。有关， 和。。。有联系， 和。。。有亲戚关系;
- be poles apart截然不同，大相径庭;南辕北辙;
- be poised to随时准备着;
- go with it随它
- hold in checkv.抑制;约束;制止;牵制;
- hand in hand手拉手，密切合作;携手;
- in step with与一致，协调;在…陪同下;（物）阶梯式;
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