Prices rise and fall according to supply and demand for head-on shrimp.

价格起伏取决于对头虾的供求。

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And some day the niftiest of these "smart meters" could even turn central-heating systems or air conditioners up or down as power prices rise and fall.

将来智能化程度最高的电表甚至能自己按照一天中电价高低的变化来关小或开大中央暖气和空调。

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As long as laptop, palmtop and notebook computers continue to grow in popularity, display prices will fall, and resolution and quality will rise.

随着膝上型，掌上型和笔记本计算机持续流行，显示器价格将会下落，分辨率和质量会上升。

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In that certain sense, prices rise and fall with great regularity as consumers tell producers what they want less and more of.

FORBES: Price Stability Is An Economically Dangerous Fad

Commodity prices rise and fall with economic cycles.

FORBES: Freeport McMoran Mines Major Cash Lode

To state the obvious, capital assets and consumer goods prices rise and fall all the time, and their fluctuations are essential for telling the markets what economic concepts should receive capital in abundance, and which ones should be starved of it.

FORBES: A Global Market Correction Authored By Governments