Medigap
n. <美>補充性醫療計劃
??? 情景例句
Come on, darlings.
來， 親愛的。
Some students quit school due to poverty.
一些學生因貧困而輟學。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧氣在空氣中的含量達到25%，它就要燃燒。