adj.（按犹太教食规）不洁净的，不可食用的
Rumour is already rife here as to Dr. Trefoil's successor.
关于特雷福伊尔博士的继任人,此间已经谣言蜂起.
They say Dr. Trefoil is very rich.
人家说,特雷福伊尔博士很富裕.
Single core cable shall be installed in either trefoil or flat formation and secured using cleats.
单芯电缆可以用三叶草法或者平直法植入.并用夹板固定.