I have to manilate the baby through the pubic symphysis.

我得从耻骨联合处把孩子夹。

And finally there's expulsion, where the anterior shoulder slips under the symphysis pubis, followed by the posterior shoulder, and then finally followed by the rest of the body.

最后，肩在耻骨联合下，接着后肩，最后剩下的身体。

After the delivery of the head, there's restitution, where the head externally rotates so that the shoulders can pass through the pelvic outlet and under the symphysis pubis.

头后，复位，头向外旋转以便肩部经过骨盆口，在耻骨联合下。