【词汇讲解】
1.Posture n. 姿势，态度，情形
如：The artist asked his model to take a reclining posture.
画家要求模特取斜倚着的姿势。
She has very good posture.
她举止很优雅。
2.Warm up 变暖，活跃起来，热身
如：No matter how hard he tried, he just couldn't warm up to that proposal.
无论他怎样努力，还是对那项计划热心不起来。
The party has begun to warm up. They warmed up the party.
晚会开得很热闹，他们使晚会热闹起来。
3.ascend v. 上升，攀登
如：The point of greatest intensity or force in an ascending series or progression; a culmination.
顶点，最高点在上升的序列或过程中达到的最大强度或力量; 极点
The airplane ascended higher and higher.
飞机渐渐升高。
4.octave n. 八音度，倍频程
如：Can you span an octave on the piano?
乍能按到钢琴的八个键吗？
Designating the three basic intervals of the octave, fourth, and fifth.
完全音程的指出八音度、四音度、五音度三个基本停顿的
5. intercostal adj. 肋间的，肋材间的