1.one-off 一次性的
例句:Our survey revealed that these allergies were mainly one-offs.
我们的调查显示,这些过敏大多是一次性反应 。
2.medical insurance 医疗保险
例句:I balanced the benefits against the costs of medical insurance.
我权衡了医疗保险的好处和它的花费 。
3.related to 有关
例句:Light industry is closely related to agriculture.
轻工业和农业密切相关 。
4.world-class 世界级的
例句:He was determined to become a world-class player.
他下决心要成为一名世界级选手 。