A conserved quantity is a big deal in math and physics.
所有跟帖:
•
你说的对,但是相对我说的不responsive啊。
-Francine-
♀
(0 bytes)
()
12/24/2017 postreply
13:11:16
•
Whether the energy is positive or negative depends on where one
-BeLe-
♀
(65 bytes)
()
12/24/2017 postreply
13:14:13
•
你说的我懂(虽然你都没说完),可能我想多了,就把正负当进出吧,就行了。
-Francine-
♀
(0 bytes)
()
12/24/2017 postreply
13:16:53