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。

youdao

Do not stick your index finger and middle finger up with the palm of your hand facing towards you in the United Kingdom; it is the equivalent of giving someone the finger.

在英国，不要在手掌面向自己时竖起食指和中指；这无异于直接对别人竖中指(在西方社会一种非常不礼貌的行为)。

youdao

You can also insert the finger that's between your middle finger and pinky.

你也可以用无名指献献身。

youdao

Now take these two fingers-- the middle finger and the thumb-- and as much as possible, from that 90 degree angle, create a circle.

再让这两个手指-,中指和姆指-,尽可能保持直角时围成一个圆圈。

哈佛公开课 - 幸福课课程节选

So-- if you don't feel comfortable doing it, don't do it-- what I'd like to do now is as following: Take your thumb and your middle finger and create as much as possible a 90 degree angle.

感觉不舒服的，就不要做，希望按下面的指示做：,让你的姆指和中指,尽可能形成一个直角。

哈佛公开课 - 幸福课课程节选

In December, Liverpool striker Luis Suarez was photographed giving an American-style middle finger to Fulham fans after his club's 1-0 loss there.

BBC: When did the middle finger become offensive?

If hardware, software and consulting are delivered by the same outfit, the customer doesn't get caught in the middle of a finger-pointing exercise when something is broken.

FORBES: Magazine Article

If off-spinner Hauritz is ruled out after being hit on the middle finger of his right hand during the team's final practice session, left-arm fast bowler Mitchell Johnson will be the only member of their attack to play in all three Tests.

BBC: Paceman Clint McKay to make Test debut for Australia