投入；作出贡献

pitching on───选中；决定

pitching into───vt.投入；开始努力工作；猛烈进攻；大吃大嚼

punching in───上班打卡

pitching upon───投靠

pitching for───争取

sketching in───约略地补充

switching on───n.接入；打开电灯开关；合闸

catching on───理解，明白；变得流行

fitting in───适应，适合；装配好；找时间做

Now the economy must be driven by net trade, with private investment pitching in as well.───现在经济必须由净贸易加上私人投资共同驱动。

has become a crucial marriage-preservation skill for young men.───已成为年轻男性维持婚姻的重要技能。

Local enterprises were also pitching in.───地方企业也加入了救灾行列。

My wife and I appreciate so much your helping us during our financial hardship. Your reaching-out and pitching-in will always be remembered.───内人和我十分感谢你在我们经济困难时的帮助。你伸出援手，作出奉献，我们会常常记得。

But after a year of pitching in their minor-league system I developed a pain in my throwing arm.───但经过一年的投手在小联盟系统I制定了疼痛，我的投掷臂。

The European Union is pitching in $14. 5 million (10 million euros), only enough to feed one-tenth of the hungry until the October harvest.───欧洲联盟投入1450万美元（1000万欧元），到10月收获季节，也只能喂饱饥饿人群的10%。

Not that involved dads must wait to be grandpas to reap rewards from pitching in with childcare.───和孩子关系密切的父亲，并不一定要等到当了爷爷才能获得协助教养孩子的回报。

Local authorities are also pitching in, helping farmers install pumping equipment and anti-drought facilities in the worst-hit areas.───地方当局也加大投入，帮助灾情最严重地区的农民安装抽水设备和抗旱装置。

The 10-year-old I have in my sights is a busy home-schooler whose days and heart are torn between pitching in the town baseball league and his beloved violin.

The Green Party is pitching in with policies on Rubbish recycling and transport.

Even the poorest unemployed father can help his children by being there, staying sober, and pitching in.

After we had seen the video everyone started pitching in with comments on its faults.

This "might be something as nontraditional as putting on a photography show, " says McDowell -- or starting a blog, launching a business, or pitching in at a nonprofit.