但许多工人需要外部帮助来决定采取什么路线。

But many workers will need outside help in deciding which routes to take.

youdao

没有人真正知道长城有多长，没人知道它是沿着什么路线来修的。

Nobody really knows how long it was or what route it followed.

youdao

告诉别人你要上哪里去，你要走什么路线，什么时候要回来！很重要。

Always tell someone where you're going, what route you're taking and when you expect to return! VERY IMPORTANT!

youdao