恐惧只是一种感觉。别让它阻止你。
Sustainable quarrying isn't an option; it's our obligation to future generations.
Success is not final, failure is not fatal: it is the courage to continue that counts.
The scientific study of behavior must be based on objective, measurable data.
我们不应承认自然事物的原因多于那些既真实又足以解释其现象的原因。
Thank you for loving us for who we are.