英语句子

吸吮是指收紧嘴唇并用舌头动作，把液体或空气吸进嘴里。To suck means to pull liquid or air into your mouth by making your lips tight and moving your tongue.

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舌头在舔的时候帮助人们品尝食物，感受食物是否光滑、热或冷。The tongue helps people taste food and feel if it is smooth, hot, or cold when they lick.

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To wink means to quickly close and open just one eye while the other eye stays open.眨眼示意指的是快速闭上一只眼睛再睁开，另一只眼睛保持睁开。

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每次眨眼时，眼睛都会分泌细小的泪液。Tiny drops of liquid from the eyes come out each time you blink.

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To snore means to make a loud sound when you breathe during sleep.打呼噜是指人在睡觉时呼吸会发出声音。

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屏住呼吸是指暂时停止呼吸，把空气憋在肺里。To hold your breath means to stop breathing for a short time and keep air inside your lungs.

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科学家认为，打哈欠可以帮助肺部获得更多空气，还能让身体降温，减少困意。Scientists believe yawning helps bring more air into the lungs and cools the body if it feels sleepy.

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呼吸是指将空气吸入肺部，再把空气呼出来的动作。To breathe means to take air into your lungs and then let it out again.

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手内部的肌肉、骨骼和关节一起配合让拳头力量更大。Muscles, bones, and joints inside the hand work together to form a strong fist.

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指关节是手指中两块骨头相接形成的关节处突起。A knuckle is the bony part in your finger where two bones meet and make a joint.

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甲周皮/角质层是一层薄薄的皮肤，位于每个手指甲和脚趾甲的根部。The cuticle is a thin layer of skin found at the base of each fingernail and toenail.

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指甲是覆盖每个指尖、从甲根开始的一块坚硬甲片。The fingernail is a hard plate that covers the end of each finger, starting just above the cuticle.

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手腕是把手和手臂连在一起的关节。The wrist is the joint that connects your hand to your arm.

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虽然小指没有那么有力，但它对许多日常动作来说依然很重要。Even though the little finger is not very strong, it is important for many daily movements.

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无名指是手上的第四个手指，在中指和小指之间。The ring finger is the fourth finger on your hand, found between the middle finger and the little finger.

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