Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.

水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。

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For this reason, any large, flat areas should be crowned convex to prevent dishing in the reverse direction.

同样原因，较大的平坦表面应稍拱起以避免在相反方向凹下。

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The number of GM decreased as the slope exposure turned from N to S, as slope increased, and as slope shape turned from convex to concave.

GM平均胸径还与坡位正相关； GM数量沿N→S的坡向梯度减少，而随坡度增大及坡形由凹转凸而增加；

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But then a colleague at his Atlanta investment company, Convex Group, passed him a plastic lid with a coupon attached to it in August 2002.

FORBES: Marketing

The potentially iconic clear plastic at the base of the unit, the convex back, and the packed feeling of that handset has been lost to a more masculine beast of a phone.

FORBES: Sony's Xperia T Is A Muscular Monster Of A Smartphone