pitch in 【非正式用语】

To set to work vigorously.

使劲干，投入：精力充沛地投入工作

To join forces with others; help or cooperate.

协力，做贡献：配合他人；帮助或合作

pitch into 【非正式用语】

To attack verbally or physically; assault.

猛烈攻击：口头或武力攻击；攻击

pitch on 或 pitch upon 【非正式用语】

To succeed in choosing or achieving, usually quickly

选出，决定，选定：成功且常是迅速地选定或实现

pitched on the ideal solution.

做出理想的决定

make a pitch

make a bid to obtain a contract or other business

投标

pitch someone/thing against

(informal)pit someone or something against

(非正式)使争斗，使竞争

pitch in

(informal)vigorously join in to help with a task or activity

(非正式)起劲地投入（任务，活动）

pitch into

(informal)vigorously tackle or begin to deal with

(非正式)（起劲地）干工作，着手处理

pitch up

(informal)turn up; arrive

(非正式)出现；到达

pitch something up (或 pitch up)

(Cricket)bowl a ball so that it bounces near the batsman

(板球)投上旋球