backward student;laggard student

In this paper has been discovered middle insensitive area of ejector in the matching between throat of the gradually expanding tube and that of nozzle.

本文发现并讨论了喷射器扩压管与喷嘴两个喉径匹配时出现的中间迟钝现象。

That is to say,the three approaches have developed step by step and they have turned from situation-absent to situation-insensitive.

这三类方案之间有内在的逻辑-历史关联,它们是逐层发展的,并实现了从情境缺场到情境迟钝的转向。

is a tutor for a low learner is really a drag.

身为反应迟钝学生的家庭教师，真累人。

Be a tutor for a low learner is really a drag.

身为反应迟钝学生的家庭教师,真累人

Tutoring slow learners is really a drag.

身为反应迟钝学生的家庭教师真累人。

a dull pupil, class, mind

迟钝的学生、 一班学生、 头脑.

a slow child, learner, pupil, etc

迟钝的孩子、 学习者、 学生等

The school offers special tutorials for slow learners.

学校给迟钝的学生提供专门的辅导。

That slow student needs more help.

那个迟钝的学生需要更多的帮助。

As a pupil, he was backward.

他读书时，是个迟钝的学生。

A slow learner can keep back the whole class.

反应迟钝的学生会影响全班的进步。

I am slow at learning theoretical constructs.

我学理论概念相当迟钝。

blunted in responsiveness or sensibility.

反应迟钝的，感觉迟钝的。

a cone-shaped paper hat formerly placed on the head of slow or lazy pupils.

以前一种戴在迟钝或懒惰的学生头上的锥形纸帽。

Mental dullness is prominent, and delirium may occur.

神志迟钝加甚，且可发生谵妄。

(of a person)uninteresting;not lively;dull

（指人）无趣的,无生气的,迟钝的.

he started a school for the mentally retarded.

他为智力迟钝的人开办了一所学校。

The teacher was patient with backward children.

那位老师对迟钝的学童十分耐心。

He was slow (quick) to react.

他反应迟钝(灵敏)。

keen [dull] sense of smell

敏锐[迟钝]的嗅觉