Practice with how much pressure needs to be put on the razor or if the thumb should hold hair against the razor's edge are each part of experimenting with this type of thinning out of hair.

这种方法需要反复练习，来摸准把头发按向刀刃的大拇指需要用多大力。

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Sharpen: a decrease in the size of the half-tone dots or the thinning of stroke of type characters.

削弱：网点的面积减少或字体笔划变幼的情况。

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The Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning of the southeastern Yangtze craton?

高度演化的黄山A型花岗岩：对扬子克拉通东南部中生代岩石圈减薄的约束?。

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They are faced with increasingly difficult physical circumstances: the food web is thinning out, many animals and plants have gone missing, their main food source a type of primitive grass is threatened, and they have to be on the lookout constantly for hostile animals, other less-evolved dinosaurs with more violent survival strategies.

FORBES: Prototyping The Distant Future