Riskless
a. 无危险的
✅ 同义词
🗣️ 情景例句
Workers have to work very hard to keep bread on the table.
工人得十分努力工作才能赚钱糊口。
Let me congratulate you on your success.
祝贺您的成功。
and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited,
所以只有在泥沙不停淤积的海洋和江河里，有时在湖泊里，