Rising incomes are whetting china 's appetite for a better diet , meaning rising demand for corn .
收入的增加令中国人提高膳食标准的胃口大开，这也意味着对玉米的需求会增加。
But nanotubes have other qualities that are whetting the appetites of engineers : they 're excellent conductors of electricity and heat , and they can be used as wires , semiconductors or superconductors .
Can experience to whet difficult is a kind of quality , presume to whet difficult is a kind of courage , be good at whetting difficult is a kind of wise and farsighted .
13-30、能经受磨难是一种品质，敢于磨难是一种勇气，善于磨难是一种睿智。
While the people were still in the drawing-room , whetting up for dinner , and coldly inspecting the late comers , the servant announced : " mr. lloyd hastings . "
