Trapezidal thread
[機] 梯形螺紋
?? 詞語組成解析
[機] 梯形的
thread
[θr?d]
n. 線;線索;線狀物;螺紋;
vt. 穿成串;將（針、線等）穿過…;用…線縫;給…裝入（膠片、狹帶、繩子）;
??? 情景例句
The Stewarts are the Stewarts!
這就是Stewart家人的本色！
To navigate
航海
Mr. Jones is with his family.
瓊斯先生同他的家人在一起。