他们认真研究了这一问题,然后才作出决定。 不及物动词 vi. 1. 学习,用功
My daughter often studies late into the night. 我女儿常常读书到深夜。 2. 努力
mission英音：['mi n]美音：['m n]
名词 n.
1. 外交使团,使节团[C][(+to)][G]
He was head of a French trade mission to the United States. 他是法国派往美国的贸易代表团团长。 2. 【美】使节团驻所,大使馆,公使馆[C]
The country maintains some sixty missions abroad. 该国在海外设有约六十个使馆。 3. 使命,任务[C][U]
He went on a secret mission. 他执行一项秘密使命。
4. (尤指在国外的)传教团,布道团[C][G]
A mission was sent to Africa by the Baptist Church. 浸礼教会派了一个传教团去非洲。 5. 慈善机构[C]
6. (人生的)使命,天职[C][+to-v]
It seemed to be her mission to care for her brother's children. 照顾她兄弟的孩子似乎成了她一生的使命。 7. 【军】作战任务;飞行任务[C]
John had already flown sixty missions. 约翰已经执行了六十次飞行任务。 8.
布道;传教[U][C] 及物动词 vt. 1. 派遣