#2480

77

Nov. 5, 2010, 5:04 p.m.

⚐ Report

//someone asks a question about a cycle on a PV diagram Pham: Look, it very easy! What we need to do? Take this wuhk that wuhk, add together. What we want?! This wuhk, this wuhk, this wuhk, this wuhk, take to get this wuhk! Now can you doing it?