alert, smart, and quick to react
注意深く、賢く、反応が早い (chuui bukaku kashikoku hannou ga hayai)
"You need to be on the ball to handle this job."
"この仕事をこなすには注意深くいる必要があります。" (kono shigoto o konasu ni wa chuui bukaku iru hitsuyou ga arimasu)
to suddenly fail or collapse
in private; secretly
to make a lot of progress or improvement
A situation or person that could become dangerous at any mom...
to receive praise or recognition for something
a single good deed or gesture to help others