1,出了大气层,宇宙飞船就不会感受到地球的引力了.（spaceship；gravity）
Out of the atmosphere,the spaceship won't feel the gravity of the earth.
2,一个宇航员可以在月球表面漂浮,而不会受到重力影响.（flost,weightlessly）
An astronaut can float on the surface of the moon without
being affected by the gravity.
3,吃了一些药,他的头痛开始减轻.（lessen）
After taking some medicine,his headache began to lessen.
4,他正在很费力地拽一大团电线.（pull,mass）
He is pulling a mass of electric wire with great dificulty.