Treasury obligations
un. 国库债务
🧩 词语组成解析
n. 义务；债务；承付款项（obligation的复数）
🗣️ 情景例句
I feel sick as a dog.
我病得很厉害。
Doris would like to see your pictures of California and so would I.
多瑞丝喜欢看你加利福利亚的照片，我也一样。
It was a cold spring morning in the city of London in England.
英国伦敦，一个寒冷的春天的早晨。