The best stock to buy is the one you already own.
化学是物质的科学，但我更愿意将其视为变化的科学。
The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that... no one ought to harm another in his life, health, liberty, or possessions.
Environmental protection is our inescapable responsibility. We must pay attention to ecological protection in the mining process to achieve sustainable development.