Concentrations
n. 集中( concentration的复数形式 ); 专心; 关注; 浓度
🗣️ 情景例句
No, thanks.
不用了， 谢谢。
Deliberate slowly,execute promptly.
慢慢酌量，快快行动。
After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
比赛结束后，坎贝尔非常失望地得知他的平均时速是299英里。