My mouth was stretched and held in an awkward position throughout the dental procedure.
在整个牙医诊疗的过程中，我的嘴巴一直大口张著，维持在很不舒服的位置不动。
The principle is to locate mouth region according to eye's size and position.
其原理是根据眼睛的位置及大小确定嘴部的相对位置。
The principle is to locate mouth region according to eye's size and position.
其原理是根据眼睛的位置及大小确定嘴部的相对位置。
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