汤姆森教授每年三次比较有待自然授粉或需人工授粉花的结实率。
Three times a year Prof Thomson compared the fruiting rate of flowers that were left to be pollinated naturally, or given extra doses of pollen by hand.
在自然条件下，柱头外露率与异交结实率成正相关。
At natural condition rate of stigma exsertion has the positive proportion with seed rate.
在自然状态下，刺梨结实率较高。
In natural condition, Roburgh Rose possesses higher fruit-setting ratio.
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