They can typically act on hard keys being pressed, like Android's search button and volume controls.
它们可以在被按下的硬式按键上提供典型的操作行为，比如说Android的搜索按钮和音量控制。
Powder Metallurgy produces fully dense pressed components and is very economic for high volume production of small simple shapes.
粉末冶金能够制造出精密压缩的组件，对于高容量小形状的产品来说特别经济实用。
The machine applies to all kinds of cotton and silk spinning factories count of yarn or oil silk, spun silk pressed into the provisions of, respectively, the volume of rectangular packet.
本机适用于棉纺厂和绢纺厂将各种支数的绞纱或油丝、绢丝等分别压成规定体积的长方形小包。
The MPC is hard-pressed to keep up with the tide of incoming data, especially with a volume of main-belt asteroid observations 100 times as great as that for NEOs.
MPC必须及时处理不断涌入的资料，尤其是来自主小行星带的小行星，观测资料量为近地物体的100倍以上。
The MPC is hard-pressed to keep up with the tide of incoming data, especially with a volume of main-belt asteroid observations 100 times as great as that for NEOs.
MPC必须及时处理不断涌入的资料，尤其是来自主小行星带的小行星，观测资料量为近地物体的100倍以上。
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