1, "sword" means "choose", but "sword" doesn't mean "choose", which is similar to the usual meaning of "pick".
2. "Picking up" and "Picking up" both have the meaning of picking up, and they are connected in this meaning. However, when doing picking comprehension now, I am used to "picking" and seldom use "picking". When I say pick and choose, I can only use "pick" instead of "pick".
"Pick up" only means "pick up", such as picking up rags, firewood and a pen. In addition to the meaning of "picking", "picking" also means choosing and choosing, such as: picking, picking fat and picking thin, and picking three things.