Depending on how deep a dive you plan to take on ROI, it may be helpful to come up to speed on financial terms that often enter into an ROI discussion.
根据您计划承担roi的深度，这可能有助于接近财务方面进入一个ROI讨论的速度。
2
It will look like you have a choice, speed or height, but either way you're still going to nose-dive into the ground.
看起来还有选择，选择速度或是高度，但无论如何最后还是会大头朝下坠向地面。
3
The porpoise happy knot team roams, the speed may amount to above 40 kilometers, they dive not deeply, the diving time cannot surpass 10 minutes.