Concentrations
n. 集中( concentration的复数形式 ); 专心; 关注; 浓度
🗣️ 情景例句
A journey of a thousand miles begins with a single step.
千里之行，始于足下。
A good horse often needs a good spur.
好马常要好靴刺。
the movements of the ground or of the table as the quake passed by.
大地和桌子的运动情况。