Definition
to secure someone or something in position using ropes
用绳索固定或绑住（某人或某物）
On windy days, we have to tie down the tent to prevent it from being blown away.
在大风天，我们必须固定帐篷，以防止它被吹走。
For safety, the workers need to tie down the materials to prevent accidents during construction.
为了安全，工人需要固定材料，以防止施工期间发生事故。
The doctor instructed the assistant to tie down the patient to ensure precision during the surgery.
医生指示助手固定病人，以确保手术期间的精确性。