主考的`英文：
be in charge of an examination
参考例句：
You made a favourable impression on the examiners.
你给主考留下了很好的印象.
I submitted my papers to the examiner.
我把试卷交给主考老师。
An examiner must frame his questions clearly.
主考人设问题时必须表达清楚。
charge是什么意思：
n. 费用；电荷；掌管；控告；命令，指示；指责
v. （使）充电；使承担；指责；装载；索价；向前冲；控告；把...记入帐册
charge the enemy
向敌人冲去
mileage charges
按英里程计算的运费
What is this charge for?
这项费用是什么？
Is there an extra charge?
有额外的费用吗？
The nucleus is formed of neutrons with no charge and protons with a positive charge
核子是由不带电荷的中子和带正电荷的质子形成的。
examination是什么意思：
n. 考试；审查，调查，考察；检查，检验
sit for an examination; take an examination
参加考试
examine by auscultation
听诊用听诊法检查
The examine is then directed to fix on the examiner's right eye.
接着就叫被检查人注视检查人的右眼。
This examination is a real challenge.
这次考试是一次真正的挑战。
The duration of the examination is three hours.
考试时间为三个小时。