Providing more food for the rapidly increasing population is yet another role for the mechanical engineer.

为快速增长的人口提供更多的食物是机械工程师的另一个角色。

youdao

Fluid shear is the mechanical force exerted by the movement of fluids over cell surfaces and has been found to play an important role in cellular differentiation, development and function.

流体剪切力是由于液体流经细胞表面所产生的一种机械力，目前发现其在细胞分化、发育及行使细胞功能的过程中起到了巨大的作用。

youdao

When drinking it due to mechanical impact and the role of foam.

使其在饮用时由于机械冲力的作用而发泡。

youdao

The exhibit includes other canvases depicting the Madonna, as well as prints and photographs that attest to the role mechanical reproduction played in the popularization of the painting.

WSJ: The Sistine Madonna | Old Masters Picture Gallery | The Madonna Above the Cherubs | By A.J. Goldmann

Sceptical of mechanical explanations, Mr Paxton throughout stresses the role of luck and human choice.

ECONOMIST: Fascism in history