Riskless
a. 无危险的
✅ 同义词
🗣️ 情景例句
That's what I love about Susan.
这就是我爱Susan的一点。
This is the book that I promised to lend you.
这就是我答应借给你的那本书。
Collecting, by occupying spare time so constructively, makes a person contented, with no time for boredom.
收藏活动通过富有建设性地利用业余时间使人感到心满意足，不再有无聊之日。