Wind the dangling floss around the middle finger of the other hand.
将悬挂着的牙线缠绕在另一只手的中指上。
我割伤了中指。
Normally the middle finger is the longest.
手指头一般都是中间那根最长。
Gesture: Cross index and middle finger and hold up.
手势：食指和中指向上交叉。
Gesture: Index and middle finger up, palm facing out.
手势：手掌朝外，竖起食指和中指。
Gesture: Pass forefinger and middle finger down your face from your eyes.
手势：将食指与中指从眼睛往下划过整脸。
One index finger to control the left mouse button, middle finger to control the right mouse button.
其中食指控制鼠标左键，中指控制鼠标右键。
One index finger to control the left mouse button, middle finger to control the right mouse button.
其中食指控制鼠标左键，中指控制鼠标右键。
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