1.up and down 上上下下；起落

Martin and I go up and down like a see-saw.
马丁和我像翘翘板一样上上下下。

Then try the "pointy-tongue" technique to stroke up and down and side to side.
然后尝试舌尖技术去上上下下和从一边到另一边弹击。

2.seem to 似乎

Financial markets seem to agree.
金融市场似乎也证实了这一点。

Investors seem to have noticed.
投资者似乎也注意到了。

3.go up 上升

Consumer prices must go up to make it workable.
为使其切实可行，电力消费价格肯定要上升。

Your car insurance goes down and your car payments go up.
汽车保险费下降了，汽车月供上升了。