Perpetual bond
[经] 永久债券
🧩 词语组成解析
🗣️ 情景例句
No pain, no gain.
只有付出，才有收获！（不劳则无获！）
All our garments are now poly-cotton, which is stronger, needs little ironing, and allows variations in patterns.
现在我们的服装都是涤棉料的，质地坚韧，不用熨烫并且花样繁多。
Fine, thanks. Oh, That's the bell. Everyone is going into class, we'd better go too.
很好，谢谢。啊，铃响了。大家都去上课。我们最好也去。