Daubery
艺术性不高的画
🗣️ 情景例句
Before a long trip I always give my car a safety check.
远行之前，我总是会对车子进行安全检查。
This airline has a good safety record.
这家航空公司有很好的飞行安全记录。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。