在部落开发能源的努力面临一系列十分恼人的障碍。

Efforts to develop tribal energy face a maddening set of obstacles.

youdao

现已形成推土机、装载机、压路机和叉车四大系列十余个品种。

Now there are four series and ten specifications for bulldozer, wheel loader, road roller and fork lift.

youdao

现在我重新发布一遍，因为这个系列十分地有用，而我也花了很多心思来构想和创作。

I am re-posting it, because it's a helpful series that I put a lot of work into creating and thinking about.

youdao