1. What is your opinion about our marketing?
关于我们的营销你的观点是什么？
还能这样说：
What do you think about our marketing?
What's your idea on the marketing?
应用解析：
marketing-sharing 市场分配

2. I think the efficient marketing channel is the key.
我认为高效的营销渠道是关键。
还能这样说：
I think it is very important to find an efficient marketing channel.
In my opinion, efficient marketing channel plays a significant role.
应用解析：
through the proper channel 通过正当途径，办理正规手续

3. I agree that the high quality is important to the success of export.
我同意高质量的产品对顺利出口至关重要。
还能这样说：
The success of export lies in the high quality.
I believe that high quality will make the export sucessfully.

4. Innovation is the key factor for enterprise's success in marketing competition.
创新是企业赢得市场竞争的关键。
还能这样说：
If the enterprise wants success, it must try to focus on innovation.
It is important for the enterprise to innovate in the fierce competition.
谚语：
The good book is the key to wisdom.
书籍是打开智慧之门的钥匙。