The the performance parameters of wheel on concrete road was highest, followed by earth road and farm field.

不同的路面，轮胎的附着性能不同，水泥路面最好，土路面次之，休闲地最差。

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Here we report the performance of British Large White on Rizhao Pig Breeding Farm in Shandong Province, which improved the British Large White in Sep. 1999.

本研究对引进的英系大白猪在山东省日照市原种猪场的性能表现进行了观察与测定，并对该场母猪配种体况对繁殖性能的影响进行了研究。

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"Using the highest performance rams and bulls is a sure-fire way to speed up on-farm improvement, " says Philip Halhead.

BBC: Investors bet on breeding success