在它生命周期的这一阶段，有短暂的一刻，其舌头由两个微小的半管组成，随后融合为一体。
For a brief moment during that stage of its life cycle, the tongue consists of two tiny half-tubes before merging into one.
在论文中我们确定了两个微小rna，当删除它们后毛细胞的发育受阻。
In this paper, we identified two microRNAs that, when removed, reduced the number of hair cells developed.
当凯什兰博士和他的团队观测火星时，他们可以分辨火星的两个微小卫星——这样的任务如果是利用牛顿的望远镜则需要一个直径最少长达30厘米的镜面。
When Dr Koechlin and his team pointed 12 it at Mars they could distinguish that planet's two tiny moons-a task which would require a Newtonian telescope with a mirror at least 30cm across.
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