The problem is that, at an aggregate level, evidence for head-honcho greed is thin on the ground.

问题是，从总体上看，表明老板们贪婪的证据很少。

But cases seem to have been thin on the ground.

但实际案例似乎很少。

Taxis seem to be thin on the ground.

【thin，thinness】出租车好像不多。

850--Officers are thin on the ground which may influence your decision.

陆军军官都挺消瘦的 这可能会改变你的决定。

Such kind of learning mode is thin on the ground these days.

这种学习模式如今已经很少出现了。

If something is thin on the ground, there's very little of it, but if it's abundant, there's plenty or more than enough.

如果某物寥寥无几，那是指它非常少，但如果它很充足，意思是它很多或很充裕。

Until around the 1970s, Spencer said, dumping legislation was thin on the ground, with few records of what was being dumped and where.

斯宾塞表示，在大约 1970 年之前，垃圾倾倒的法规很少，几乎没有关于倾倒对象和倾倒地点的记录。

Because there's no sunlight on the ocean floor, it's hard for plants and creatures to survive, so forms of life are thin on the ground – there are only a few of them.

因为海底没有阳光，植物和动物很难生存，所以生命形式寥寥无几——只有少数几种。