数学是科学的钥匙和门。
The customer's voice is the most important sound in any business.
与孩子们在一起,灵魂得到治愈。
过去不是可以返回的地方,而是用来构建的材料。
When we talk about food security, we're really talking about national security.
Innovation in oil and gas is not a choice; it is a necessity for sustainable development.