麦二叉蚜只在夏茬燕麦叶部上发现，发生数量不大。
Sch. graminum Ronda's number was very little, only was found on summer stubble oat.
几个世纪以来，人们使用家具的种类和数量都发生了根本的改变。
Over the centuries, the amount and the kinds of furniture people use have changed radically.
但实际上，如果物品数量不够会发生什么？
But in reality, what should happen if item is not available?
这可能就会使整个曲棍球领域发生翻天覆地的改变，优秀的球员数量倍增。
This would possibly change the playing field and double the amount of great players.
布朗称：“想让小丑瓢虫种群数量骤减，必须有天敌介入或者疾病发生。”
That a population crash occurs as a result of natural enemies or disease.
唯一令人惊讶的地方是其发生的位置与数量。
唯一令人惊讶的地方是其发生的位置与数量。
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