Nhiều cô gái xinh đẹp

• 00:05
• 00:32
• 00:58
• 01:25
• 01:52
• 02:18
• 02:45
• 03:12
• 03:38
• 04:05

Secondly, we have to learn to cooperate and compete. Last year, when SARS was spreading rapidly in China, scientists all over the world cooperated with each other and prevented the disease from spread