To measure (the depth of a body of water).
To test (an upright surface) to determine the vertical.
Answer:
放学后，他去图书馆看书。Without the comma, it would be 他放学后去图书馆看书。
Explanation:
The literal translation of the first one: After school, he goes to the library to read books. The second one is: He after school goes to the library to read books. 放学=after school 后=after 他=he 去=go/goes 图书馆=library 看=see (in this case "read") 书=books
The way of speaking a word is its pronunciation. The origin is what other language the word comes from.
Well it can be Mexican Cuban (things like that) so I think European :)
