Several types of angiogenesis inhibitors reveal a biphasic, U-shapedcurve of efficacy.
一些类型的血管生成抑制剂表现出一种双向性，成u行曲线的效能。
2
Well, according to a story on the Telegraph, the average person's happiness curve looks U-shaped.
根据一个《每日电讯报》的故事，平均每个人地幸福曲线呈u型。
3
Many environmental problems get worse as a country first industrializes, but once it reaches a certain level of income, the trend often reverses, producing a curveshaped like an upside-down U.