The primary rules of obligation are those that require or forbid certain actions.

Paris is a city where you can lose yourself and find yourself at the same time.

Innovation in aquaculture isn't just about technology; it's about sustainable practices that protect our oceans for future generations.

注意时令变化，节制饮食，这是从自己身体上驱除疾病的方法。减少嗜好情欲，戒除烦恼，这是从自己心理上消除疾病的方法。

请勇往直前，一路勇往直前，然后用推特（Twitter ）大肆宣扬你努力的成果。搞不好你会名满天下。

The best preparation for tomorrow is doing your best today.