几乎所有早期人类都是用普通弓或短弓。

The ordinary bow or short bow as used by nearly all early people.

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矮人弓是把需要特殊技巧的强力短弓。

Dwarf bow are powerful short bows of exceptional craftsmanship.

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以观察胎心四腔观为基础，酌情增加长轴、短轴、主动脉弓等切面观，并适当配合彩色多普勒及脉冲多普勒超声检查。

The main view observed was four-chamber and combined with long axial view, short axial and aortic arch view etc, as well as color Doppler and pulsed Doppler examination.

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