The HC emissions are increased remarkably when the mixture concentration becomes too lean or too rich.

当首循环混合气浓度过浓或者是过稀时，瞬态hc排放迅速增加。

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Seeing that they are getting too fat, some people go on a diet that's too stringent or too lean in order to lose weight.

看到他们变得太胖，有些人节食太严格或者太瘦为了减肥。

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So, we wouldn't want animals to become too lean, so that might reduce marbling in the product, especially in the quality cuts where the profit is.

我们不希望动物太瘦，这样会降低肉类产品的纹路，特别是利润所在的高质量肉片。

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"I saw all these ships waiting out there,I am guessing, waiting their turns to load and unload the cargo, so,I said,Why do the ships come into the harbor?" Why not have the harbor go out there and bring the goods in?'" Researchers describe the mobile harbor as a lean, light system for unloading container ships even if the coastal area is too shallow for them to dock.

VOA: standard.2010.01.04

You would? Be careful, don't lean over too much.

你会吗，小心别太靠着那栏杆。

耶鲁公开课 - 公正课程节选

He described BP as "too lean" following rounds of cost-cutting that led up to the disaster.

BBC: BP: Gulf of Mexico oil spill 'shared responsibility'

The question is whether it is too lean to accommodate such a shift in the industry.

ECONOMIST: Personal computers

That kind of collar might be too lean for a classic notch lapel sport coat, he says.

WSJ: Guide to Men's Shirt Collars: Which Styles Go With Which Occasions and Flatter the Face