Some toothbrush shapes will suit some mouths better than others. Make sure that your toothbrush bristles comfortably reach your backmost molars, as some brushes may be too large or wide.

某些牙刷刷头的形状会比其他形状的更适合你的口腔，要确保你牙刷的刷毛能够触抵你臼齿的最后端，既不能太大也不能太宽。

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People make noises because they eat without closing their mouths.

因为人们吃东西时没有闭上嘴，故而发出噪声。

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Don't make noises with your mouth. People make mouth noises because they eat without closing their mouths.

吃饭嘴别出声，嘴出声是因为吃饭没有闭着嘴嚼。

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Ireland is working hand in hand with the United States to make sure that hungry mouths are fed around the world -- because we remember those times.

WHITEHOUSE: President Obama Addresses the Irish People

What volunteers had failed to realize was that the comparisons they were making when the chips were in their heads were not the comparisons they would make when the chips were in their mouths.

FORBES

In coordinated groups, the animals first cornered and then herded a massive school of herring, blowing bubbles around them to confuse the fish and make them swim tighter, until, surging through the middle of the school with mouths agape, the humpbacks boiled to the surface in a feeding frenzy.

BBC: Cruising into Gold Rush country