求救啊 1 EC2 Compute Unit (1 virtual core with 1 EC2 Compute Unit) 这个是什么意思啊！几核的CPU呀

求救啊
1 EC2 Compute Unit (1 virtual core with 1 EC2 Compute Unit) 这个是什么意思啊！几核的CPU呀 大概多少HZ啊。
这个分几U么
4 EC2 Compute Units (2 virtual cores with 2 EC2 Compute Units each)
8 EC2 Compute Units (4 virtual cores with 2 EC2 Compute Units each)
Up to 2 EC2 Compute Units (for short periodic bursts)
6.5 EC2 Compute Units (2 virtual cores with 3.25 EC2 Compute Units each)
13 EC2 Compute Units (4 virtual cores with 3.25 EC2 Compute Units each)
26 EC2 Compute Units (8 virtual cores with 3.25 EC2 Compute Units each)
5 EC2 Compute Units (2 virtual cores with 2.5 EC2 Compute Units each)
20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each)
33.5 EC2 Compute Units (2 x Intel Xeon X5570, quad-core “Nehalem” architecture)
33.5 EC2 Compute Units (2 x Intel Xeon X5570, quad-core “Nehalem” architecture)
这些都是大概多大的CPU呀 求高手告知！！！

怎么没有人回答呀！
没有人知道么