他老是记不起把自己阅读时用的放大镜放在什么地方，所以助手们会随身携带备用的。He misplaces his reading glasses with such regularity that aides carry extras.他本该带上一把备用钥匙的。He could have taken a spare key.备用罐上写着“高度易燃”。"Highly inflammable," it says on the spare can...
She frees her mass of hair from a rubber band and shakes it off her shoulders.她解开橡皮筋，将浓密的头发披散在肩头。The little girl stretched her rubber band.小女孩拉长橡皮筋.He stretched the rubber band till It'snapped.他拉长橡皮筋,啪地一声拉断了....