Durableness
[化] 耐用年限
🗣️ 情景例句
This has been a hard course for me.
这门课对于我来说很难。
Books, like friends, should be few and well chosen.
书籍如朋友，应该少而精。
The swallow shares the virtues of both schools in highest measure.
燕子充分兼有这两类鸟的长处，