to start working seriously on something important
重要なことに真剣に取り組むことを始める (juuyou na koto ni shinken ni torikumu koto o hajimeru)
"I have to buckle down on my thesis this weekend."
"今週末、私は自分の論文にbuckle down onしなければなりません。" (konshuumatsu, watashi wa jibun no ronbun ni buckle down on shinakereba narimasen)
to make a careless mistake while doing something
to use your abilities fully to achieve success
to remind colleagues politely about something
to study or read something carefully
to acknowledge someone’s contribution
to tug or hold onto something repeatedly
