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%kI-XD4H;#7cd~。

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GyBT!Ny9UuD5v^。

3.related to 有关

例句：Light industry is closely related to agriculture.
轻工业和农业密切相关ZQWnKA!N,Zx6]L^。

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9jY!2rfa2KN7=。