出自北齐·颜之推《颜氏家训·文章》。书写文章要尊崇“三易”的原则，即文章内容要清晰明了，这是第一项。书写的文字要简单概要，这是第二项。书写的段落要读起来朗朗上口这是第三项。
Innovation in agriculture is not just about technology; it's about changing mindsets and embracing sustainability.
Chemistry is the art of manipulating matter at the molecular level, and catalysis is its most powerful brush.