four key problems
双语例句原声例句
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There are four key problems now confronting the iron and steel industry which must be solved.
当前，钢铁工业重点要解决四个问题。
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In a help session what he might do typically is solve between four and eight problems that illustrate the key principle being talked that week.
在帮助课程中他一般会，解决4到8个问题，来阐明那一周教的关键原理。
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Because the environment question is global one of four major key problems, the Ministry of education soon integrates "environment education" nine year compulsory educations the required course.
由于环境问题是全球的四大重点问题之一，教育部即将把《环境教育》纳入九年义务教育的必修课。
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In a help session what he might do typically is solve between four and eight problems that illustrate the key principle being talked that week.
在帮助课程中他一般会,解决4到8个问题,来阐明那一周教的关键原理。
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