在许多半干旱的地区中，同样存在树带界限的下限区域；在这片区域之内，由于缺乏水分，森林下沿区域的植被通常会逐渐变成干草原或沙漠。

In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.

youdao

这对于大学来讲可能解决了组织上面临的主要挑战，但对于学习者而言，由于缺乏时间、家庭义务或资金，挑战仍然存在。

This could fix the main organisational challenges for the university, but not for the learners, due to lack of time, family obligations or funds.

youdao

这可能是由于缺乏化肥、资源管理或农艺学不良、在错误的时间有太多水或太少的水。

It may be lack of fertilisers, poor husbandry or agronomy, too much water or too little at the wrong time.

youdao