ejection的例句（ejection在句子中的用法）

• The cometary ejection play a crucial role in formation and evolution of the meteoroid stream. 彗星的喷发速度在流星群的演化过程中起着重要作用.
• Rapid prototyping manufacturing in the ice pattern is actualized through FDM and separate ejection. 采用FDM方法、离散式喷射实现了冰模快速成形.
• A rocket is propelled by the ejection of a portion of its mass to the rear. 火箭是靠向后喷射其部分质量而推进的.
• Most of the crater is formed by ejection. 大多数的弹坑是由于把泥土抛出而形成的.
• Radioactivity is the ejection of particles or radiation from the nucleus. 放射性是原子从核中射出粒子或辐射的现象.
• Ejection murmurs begin after S 1 and are usually crescendo - decrescendo ( diamond - shaped'), ending before S 2. 喷射音始于S1后,通常有渐强 - 渐弱特征, 并于S2前结束.
• Objective To Validte the Yeliabil of left ventricle ejection fraction ( LEF ) measured by reconstructed impedance cardiography ( RICG ). 目的验证重建心阻抗图测量左室射血分数 ( LEF ) 的可靠性.