buck up是什么意思？

• monitor
• various
• front
• searches
• sweater
• 导师英文
• juice
• 领域英语
• theatre
• giraffe
• begins
• cloud
• dragon
• maths
• BARRIE
• disappointed
• 流浪者英文
• 参数英文
• vehicle
• crayon
• explore
• 缺陷英文
• bombarded
• 权限英文
• prompt
• rice
• intermission
• searches
• droplets
• predict

• client
• autumn
• 呼吁英语
• tomato
• 造型的英文
• permitted
• 局外人英文
• supper
• 分配英文
• amazing
• 实施英文
• aspect
• fake
• 确认英文
• fiercely
• giraffe
• lake
• text
• bothering
• erased
• satisfaction
• 抛弃英文
• 队长的英文
• silver
• 解决方案英文
• repeat
• general
• pear
• mind
• scared

• in a way
• in a word
• keep an eye on
• keep company with
• keep in mind
• keep pace with
• keep a promise
• keep track of
• keep back
• keep on
• keep to
• keep up
• keep up with
• lead the way
• learn by heart
• lose heart
• lose contact with
• lose sight of
• lose track of
• let off
• live by
• live on
• live through
• look back
• look in
• look over
• look up
• more or less
• make the best of