Conclusion the extra small chromosome is part of the chromosome Y.
结论：额外小染色体来源于Y染色体。
Just get a smaller size. - This is the smallest size, it's the extra small.
换小码呗~-这就是最小号了…而且这是特小号。
The design and main feature of semiautomatic multi-use grinder for miniature and extra small bearings is introduced.
介绍了半自动微小型轴承多用磨床的结构设计及其特点。
Teacup is a name given by breeders to describe an extra small dog, presently there is no universal standard of measure.
茶杯是繁殖者用以描述特别细小的小狗额外加上的名称，目前没有通用的量度标准。
Teacup is a name given by breeders to describe an extra small dog, presently there is no universal standard of measure.
茶杯是繁殖者用以描述特别细小的小狗额外加上的名称，目前没有通用的量度标准。
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