靜者恆靜,動者恆動~~急!!

An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction

"inertia"應該係你所指「靜者恆靜,動者恆動」既英文
= Newton's First Law


Inertia means an object tends to stay in its motion (靜 or 動)if no exernal force is added or removed from it

'stay still stay..move still move.'