1.grudge against 怨恨
例句：An employee might have a grudge against the company.
雇员可能对公司有攻击动机。
2.guard against 防止，防范
例句：Be on your guard against pickpockets.
提防扒手。
3.guess at (或about) 推测，猜测
例句：Just guess at what the change should be?
只是猜测应该是什么改变？
4.guest lecturer 客座讲师
例句：The only person who understood the guest lecturer was the professor.
唯一能听懂特邀演讲人的是教授。
5.gym bag 运动包傲运动器械、运动服装
例句：Hayden grabbed his gym bag, and we raced downstairs.
海登拿起他的运动包和我一起跑到楼下。
6.gym shoes 运动鞋
例句：I still have the courage to go gym shoes.
我还是没有勇气穿鞋去体育馆。