do many things at once

齐头并进───do many things at once

the country are now waiting to be done, but at present they are not able to do the things all at once.───这个国家现在是百废待举，但目前他们还不能做到百废俱兴。

For the same person also is not able to have two different requirements, goals, strategies can do many things at once.───对同一个人也就是不能有两种不同要求，目标一致，策略趋同者才能齐头并进。

You have no reason to hurry, no reason to cut corners or to try to do too many things at once.───你没有理由匆忙，没有理由走捷径，也没有理由一次做太多的事情。