on a formal occasion men are expected to wear suits and women dress.
在正式场合,男士应该着西装,女士应该着套装。
for a formal occasion at the palace you must wear tails.
在宫廷正式的场合中,你应该穿燕尾服。
he is such a gauche person without finesse who always makes gauche remarks on a formal occasion to annoy most people.
他是个难登大雅之堂的拙劣之辈,总在正式场合上大放愚论,令多数的人恼怒不堪。
why not wearing pajamas when you are not going further and not in a formal occasion or not stay very long outside, many people think so.
很多人认为,又不走远的地方,不是出席正式的场合,不在外面停留太久,穿睡衣有什么不行?