Never risk more than you can afford to lose.
永远不要冒你无法承受的损失的风险。
公用电话,希望你会打给我。
海洋不仅仅是一种待开发的资源,更是我们必须为子孙后代保护的脆弱生态系统。
What do we call visible light? We call it color. But the colors are only the names we give to the way light behaves when it hits something.