1·If necessary, place a small cushion or rolled towel behind the curve of your lower back.
如有必要，在后背下部的弯曲后面放置一个小靠垫或是卷起的毛巾。
2·Maintain the natural curve in your lower back, and keep your core muscles tight.
保持腰背部的自然弯曲，保持收紧你的核心肌肉。
3·At this speed the human body may curve away from the cliff.
以这种高速下坠人体回因为崖体的影响而弯曲。
4·This phenomenon, predicted by Einstein's theory of general relativity, causes light to curve as it flies through space-time that has been dented by the gravity of large bodies of mass.
这一现象是指光线在时空中传播的过程中由于大质量物质的引力而发生弯曲，这也是爱因斯坦的广义相对论所预言的。
5·I touch the padded curve of the ceiling for added balance as I walk, and I smile when I reach the cockpit.
我一边走，一边摸着机舱顶部的弯曲软垫，以增加平衡。到达驾驶舱时，我笑了。