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.
应用推荐