/ˌsem.i.kənˈdʌk.tɚ/
semi-
half; partly 半；部分
semicircular
半圆形的
semi-final
半决赛
a solid substance that conducts electricity in particular conditions, better than insulators but not as well as conductors 半导体
conductor
/kənˈdʌktə/
(BrE also guard) a person who is in charge of a train and travels with it, but does not drive it 列车长(physics 物理) a substance that allows electricity or heat to pass along it or through it 导体（导电或导热等的物质）Wood is a poor conductor.木头是不良导体。
tutor: /ˈtjuːtə/
(especially BrE) a teacher whose job is to pay special attention to the studies or health, etc. of a student or a group of students 导师；指导教师
his history tutor
他的历史导师
He was my personal tutor at university.
他是我大学时的个人指导教师。
She’s in my tutor group at school.
她在学校里是指导我的那个小组的成员。
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