at the start of the winter
初冬に
at [on] the stroke of midnight
深夜０時ちょうどに
at [on] the stroke of twelve
１２時が鳴ると；１２時きっかりに
at the time of expiration
任期満了のときに
at the top of a table
上座に
at the top of one's lungs
声を張り上げて，声を限りに
at the top of one's speed
全速力で
at the top of one's voice
声をふりしぼって
at the top of one's voice
声を限りにして
at the top of the list
リストのいちばん上に，最優先事項で
