- 赤道: the equator
- 口: mouth
- 孔: hole; opening; aperture
- 口孔: aperturae; buccal aperture; mouth opening; oral aperture; oral opening; oral pore; osculum; throat
- 道口: (铁路与道路的平面交叉) road junction; level crossing (亦称“平交道”) 道口事故 level crossing accident
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