Lowered grades and poor school performance.
导致考试成绩较低和学业成绩差。
There\\\'s a double threat out there that may help explain poor school performance, criminal behavior, alcoholism, and the growing numbers of Alzheimer\\\'s patients.
有一个双重威胁也许可以帮助解释恶劣的学校表现、犯罪行为、酒精中毒和阿尔茨海默氏症的患者的增加。
Relatively low levels of exposure can reduce their IQ scores, cause learning disabilities, poor school performance, and violent behaviour, all of which may contribute to reduced lifetime earnings.
较低量接触可降低其智商评分，引起学习障碍、学习成绩不良以及暴力行为，所有这些可促使终生减少收入。
Bipolar disorder may appear to be a problem other than mental illness-for instance, alcohol or drug abuse, poor school or work performance, or strained interpersonal relationships.
双向情感障碍会显得像个问题而不是精神疾病——例如，酒精或药物滥用，较差的学校或工作表现或紧张的人际关系。
This can cause poor performance in school, difficulties in social situations, and a loss of confidence and self esteem.
这就引起他们在学校里的不良表现，社交上的困难，以及自信和自尊的丧失。
That is almost entirely due to poor performance in Wales, where pass rates in school-leaving exams have also been falling compared with those in other parts of Britain.
这几乎完全是由于威尔士的教学质量底下造成的。和英国其他地区相比，威尔士的离校考试通过率正在不断下降。
The boy's poor performance at school concerned his parents.
这个男孩在学校很差的表现，使他父母很担心。
Students of secondary vocational school have poor basis, wake study motivation, no good study habits, however, they have a strong plasticity and their performance and ability can be improved greatly.
中等职业学校的学生基础差、学习动机不强、没有养成良好的学习习惯，但是也正因为如此他们具有很强的可塑性，他们的成绩和能力有很大的提升空间。
The reports issued in the Archives of Pediatrics & Adolescents Medicine find that watching too much TV leads to poor performance in school.
《儿科和青春期医学档案》杂志研究发现看电视时间太长会导致学习成绩差。
But I did a very poor academic performance and was quite a black sheep in my family, then I left junior high school without graduation when I was 15 years old.
但是我在学校成绩不好，在家里也是不是个好儿子，15岁的时候初中还没有毕业就辍学了。
But I did a very poor academic performance and was quite a black sheep in my family, then I left junior high school without graduation when I was 15 years old.
但是我在学校成绩不好，在家里也是不是个好儿子，15岁的时候初中还没有毕业就辍学了。
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