Concaveness
n. 凹面, 成凹形
✅ 同义词
🗣️ 情景例句
Work harder and practice more.
要更加努力地学习，更加勤奋地操练。
If you trust before you try,you may repent before you die.
不经考验就依赖，不到瞑目便的悔。
One lady brought in a biscuit on a wheelbarrow.
一位女士用手推车运来一个饼干，