concentrate (sth) (on sth/on doing sth); concentratev.集中(注意力);聚精会神;使…集中(或集合、聚集);(使)浓缩 It is difficult to make oneself con...
all attention聚精会神,十分专心; all day整天; all Fools Day愚人节; all night通宵,整夜; all ones life生平 all seas四海,全世界; all speed最高速...