觉得如用 has proven, 后面要加东西. For example: has proven to exist; has proven true, et al.
觉得如用 has proven, 后面要加东西. For example: has proven to exist; has proven true, et al.
• you are right -Arline- ♀ (140 bytes) () 10/06/2011 postreply 13:35:08