Although these weapons are not especially sophisticated, months, if not years, of on-the-ground training would still be necessary.

尽管这些武器不是几年时间是不会很熟悉的，仅仅数月的训练仍然是必须的。

youdao

The feather still fly in the sky, do you want to be a "foolish guy" when it fall on the ground.

羽毛仍然还在空中飘，当它落下时你愿做一个愚人吗？

youdao

There will still be about 8000 more troops on the ground than before the so-called surge began.

NPR: McCain, Obama Tussle over Iraq

Yet the latter can be useful, particularly when the former are still rather thin on the ground.

ECONOMIST: The United Nations

Many of the disagreements from that meeting are still unresolved - although anti-globalisation protesters are likely to be thin on the ground.

BBC: Key trade talks in the balance