I think more advertisement is the key to our success.
我认为多做广告是我们成功的关键。
I'm afraid I can't accept your argument. Improving the quality of our products is the best way. No quality, no success.
恐怕我的观点有所不同。提高产品质量才是最好的方法。没有质量，就没有成功。
That's an ideal theory, but I don't think it works nowadays.
那是一种理想的理论，可我认为当今它行不通。
I know I'm correct.
我认为我是正确的。