任何企业的生命线都是它的客户。
"The lifeblood of any business is its customers."
真实的存在意味着为个人选择承担责任。
The past is a foreign country; they do things differently there.
The language of mathematics is universal, transcending cultural and linguistic barriers.
每一个挑战都是学习和改进的机会。
The challenge for us is to create content that is compelling and relevant.