Phthalanone
邻羟甲基苯甲酸内酯
🗣️ 情景例句
I haven't ruled out the possibility.
我还没有排除期可能性。
I hope that I can make a worthwhile contribution to the efforts of this group.
我希望能对这个团体努力的成果提供有价值的贡献。
In 1898 a law was passed which meant that all people above a certain age were paid a weekly old-age pension.
1898年通过了一项法令，规定一定年龄以上的人全都可以按周领取"老年养老金。