两只手的食指和大拇指分别捏紧牙线的一端，中间留出一英寸长（2.5厘米） 。
Hold the floss tightly between your thumbs and forefingers, with about an inch (2.5 cm) of floss between them.
同样地，用食指和大拇指围成一个圈的表示OK 的手势，在法国表示“零”，在日本表示“钱”。
Likewise, a sign for OK, forming a circle with our forefinger and thumb, means zero in France and money in Japan.
大部分时间，这两个地址板块卡在一起，北美板块被挤压，很像一个扑克牌夹在大拇指和食指之间。
Most of the time, the two tectonic plates are stuck together, and the North American plate is squeezed, much like a playing card held between the thumb and forefinger.
法向量向上，想象你把你的大拇指沿着C放，食指指向s，那么你的中指就会向上。
Normal vector points up. Imagine that you put your thumb along c, your index towards s and then your middle finger points up.
大拇指和食指用力下压。
可以尝试一下快速针压法：掐虎口(大拇指和食指之间的部位)2分钟，然后慢慢松开。
Try this quick acupressure technique on yourself: pinch the point between your thumb and forefinger and hold for two minutes then gradually release.
用你的大拇指和食指捏住耳垂，进行小弧度的温柔按摩。 享受几分钟后，移动你的手指到外耳的中部，轻轻地旋转你的整个耳朵。
Use your thumb and index fingers to gently massage your ear lobes in small circles.
使用筷子时，要把一双筷子夹在大拇指和食指之间。
When using chopsticks, one should place both sticks between the thumb and forefinger.
这被称为“右手”坐标系统，因为你右手的大拇指、食指和中指可以被用来表示三个方向。
This is called a "right-handed" coordinate system because the thumb and first two fingers of your right hand can be used to represent the three directions.
吃饭时，要端起碗，大拇指扣住碗口，食指、中指、无名指扣碗底，手心空着。
At meal time, to Duanqiwan, thumbs withhold CD, forefinger and middle finger, ring finger deduction north and palms empty.
他把钓索夹在大拇指和食指之间等待着。同时盯着它和其他那几根钓索，因为这鱼可能已游到了高一点的地方或低一点的地方。
He waited with the line between his thumb and his finger, watching it and the other lines at the same time for the fish might have swum up or down.
比如控制食指运动的神经元就靠着控制大拇指运动的神经元。
For example, neurons that control the thumb's movement are arranged next to those that control the forefinger.
揉捏眼穴脚趾抓地用双手大拇指和食指的螺纹面捏住耳垂正中的眼穴，其余三指自然并拢弯曲。
Both thumb and index finger acupoint pinch the Yan acupoint in the middle of the lobe. And the other three figures natural are draw close to each other and keeping bend.
在彩带另一个方向形成第二个圈，将它的末端又回到大拇指和食指。
Make a second loop going the opposite direction, returning the end to your thumb and forefinger.
Okay的手势把大拇指和食指连成一个圆形，是流行的表示“好”的手势，可在许多拉美国家，该手势却是对人的侮辱。
The A-Okay Joining the thumb and index finger in a circle is a popular way of saying Okay, but it is an insult in many Latin American countries.
他用大拇指和食指有力地板住温斯顿剩下的一颗门牙。
He seized one of Winston's remaining front teeth between his powerful thumb and forefinger.
鸟类学家们用大拇指和食指构成V形量测角度。
The ornithologists made Vs with their thumbs and forefingers, measuring angles.
在你早上起床之前，用你的食指和无名指压在你腕部大拇指下部，数数30秒内脉搏跳几下。
Before you get out of bed in the morning, press your index and middle fingers against the inside of your wrist below your thumb and count the beat for 30 seconds.
比如，能够用右手的大拇指按住右鼻孔，用右手的食指或外指按住右鼻孔。
For example, your right thumb will close off your right nostril while your right index or middle finger will close off your left nostril.
测试者被要求区分是大拇指还是食指被触摸，错误的次数以及整个反应的时间被记录下来。
The subject was asked to distinguish between touches on the thumb and forefinger of the hand, and the number of errors - and the overall reaction time - were recorded.
最后，他从我的身后用食指和大拇指捏住我的腰部，把我提了起来，拿到离他的眼睛三码远的地方，以便更仔细地观察我的模样。
At length he ventured to take me up behind by the Middle between his fore Finger and Thumb, and brought me within three Yards of his Eyes, that he might behold my Shape more perfectly.
最后，他从我的身后用食指和大拇指捏住我的腰部，把我提了起来，拿到离他的眼睛三码远的地方，以便更仔细地观察我的模样。
At length he ventured to take me up behind by the Middle between his fore Finger and Thumb, and brought me within three Yards of his Eyes, that he might behold my Shape more perfectly.
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