You then maintain that pace over your chosen distance.

你需要保持这种步调，直到通过你选定的距离。

youdao

You simply start running, gently, and then build up to a steady pace. You then maintain that pace over your chosen distance.

你只需要慢慢的开始跑，然后逐渐增快到一个稳定的步速，并保持这一步速直到跑完你所选定的距离。

youdao

Observe, at a distance, one to two hours in your chosen site.

针对您所选定田野调查场所进行一至两个小时之远距离观察。

youdao