Collateral bond
[经] 有担保的债券
🧩 词语组成解析
🗣️ 情景例句
It's one of the best schools in the country, Robbie.
这是全国最好的大学之一， Robbie。
The population of Africa is growing by leaps and bounds.
非洲的人口正在极其迅速地增长。
may have left an automatic messenger behind to await the possible awakening of an advanced civilization.
很可能会在离开太阳系时留下自动化信息装置，等待先进文明的觉醒。