This little bird, the stonechat, ramps up its immune system to kill bacteria in the summer before migrating, which requires a lot of extra energy.
这只小鸟,石聊,在迁徙前的夏天增强其免疫系统以杀死细菌,这需要大量额外的能量。
单词 | stonechat |
释义 |
stonechat
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