对于领域性的和同域性的物种形成，强化是必需的。
Reinforcement is required for both parapatric and sympatric speciation.
稻鸭共作对天敌在稻株中的发生部位和同域性也具有一定的影响。
Rice-duck farming also had definite effects on the occurrence position and spatial domain of main predatory natural enemies on rice plant.
天敌和害虫在空间上的同域性和时间上的同步性说明了天敌对害虫控制作用较明显。
The sympatry in space and the synchrony in time indicated that these natural enemies had high efficiency to control their preys.
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