1·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。
2·Instead, they migrated beyond the organizer's boundaries to a position where, later on, high concentrations of sonic hedgehog turned them into the middle finger.
相反，他们迁移出了“组织者”细胞群的边界，随后达到一个高浓度的音猥因子的位置，并发育成中指。
3·Start by holding a small amount of the cable with your thumb and/or middle finger. Then, with your other hand, begin wrapping the cable in a figure-8 between your pinky and index fingers.
开始先用拇指和中指捏一段线在手里，然后，用另一只手把线绕在食指和小拇指上，成8字形。
4·blogger Allen switched his wedding ring to his middle finger and held it up as a photo jesture to the people of California.
的博主艾伦拍了张照片送给加州的人们，在照片中他把戒指换到了中指，并对着镜头竖起了它。
5·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。