at the art festival：在藝術節(jié)上,在藝術節(jié)期間

at the age of ... 在......歲的時候 | at the art festival 在藝術節(jié)上,在藝術節(jié)期間 | at the base 在底部

as a result of sth：由于---的結果

21. as a result 結果 | as a result of sth.由于---的結果 | 22. the children of school age到了入學年齡的孩子們

for one's part=as far as...be concerned：就...而言

for one's age 就...年紀而言 | for one's part=as far as...be concerned 就...而言 | for some reason or other 為了某種理由

tuition assistance：助學金

school-age children適齡兒童 | tuition assistance助學金 | vocational education職業(yè)教育

dynamical astronomy：動力天文

dynamical age 動力學年齡 | dynamical astronomy 動力天文 | dynamical evolution 動力學演化

At an early date：早日; 盡快

at an early age 在小時候,年輕時 | at an early date 早日; 盡快 | at an end結束

at that moment：在那時

at table 在進餐中 | at that moment 在那時 | at the age of 在......的歲時

at that time：那時

at school 在學校 | at that time 那時 | at the age of 在...幾歲的時候

at that：而且還是 偏偏又是

at that time | 在那時 | at that | 而且還是 偏偏又是 | at the age of | 在歲

at the back of：在~~背后,支持

at the beginning of 在~~開始時 | at the back of 在~~背后,支持 | at the age of ~~歲時