习惯安静 Used to quiet ; Customary quiet

静物习作 Still Life Sketch

静态练习 Improving on static

静心学习 Meditation learning ; Learn meditation

习惯这宁静吗 Habit this quiet ; accustomed to this quiet

练习用静音器 practice mute

静力练习 isometric exercise

静态学习 static learning

静力学习题求解的捷径 Journal of Hangzhou Medical College