That number is smaller than current figures for the effective population size (or number of breeding individuals) for endangered species such as chimpanzees (21, 000) and gorillas (25, 000).
当时的人数甚至不及现在濒临灭绝的黑猩猩（21000头）和大猩猩（25000头）的有效种群大小（即能生育的个体数量）。
Larviciding measures at mosquito breeding sites are the most effective form of vector control if breeding sites can be clearly identified and are limited in size and extent.
如果蚊子滋生地点可以明确确定并且范围和程度有限，就地采取杀幼虫措施就是十分有效的媒介控制形式。
Larviciding measures at mosquito breeding sites are the most effective form of vector control if breeding sites can be clearly identified and are limited in size and extent.
如果蚊子滋生地点可以明确确定并且范围和程度有限，就地采取杀幼虫措施就是十分有效的媒介控制形式。
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