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It is necessary to integrate theory with practice.
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理论联系实际是重要的。 |
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It is necessary to keep up with scientific advances.
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跟上科学步伐是必要的. |
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It is necessary to know its proportion of the two kinds of pollution in the region for more pertinency for pollution prevention measures during the practical environmental protection.
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在现实环境保护工作中，为了使污染防治措施更有针对性，有必要了解区域内两类污染各自所占的份额。 |
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It is necessary to learn annotation for medical classics research, which is not very easy to understand correctly.
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摘要“医经”是医学的经典，学习医学经典离不开历代医家的注释，但要正确解读并非容易。 |
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It is necessary to make a distinction between right and wrong.
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必须分清是非。 |
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It is necessary to oppose and reject all kinds of cacodoxy against Marxism for the purpose of keeping the status of Marxism.
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坚持马克思主义的指导地位，必须坚决反对和抵制各种反马克思主义的错误思潮。 |
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It is necessary to plan flood control and waterlogged elimination, calculate and analyse the size of water gate, as well as to bring forward the reasonable and feasible running way.
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要解决好围涂工程中的防洪除涝问题，必须做好全流域范围内的防洪除涝规划和围区规划工作，计算、分析并确定水闸规模，最后提出合理可行的水闸运用方式。 |
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It is necessary to put religion into the frame of the state and society, and integrate the sociological study of religion with the religious study of sociology.
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中国宗教社会学的研究，应当把宗教置于国家与社会的架构之中，是宗教的社会学研究与社会学的宗教研究的结合。 |
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It is necessary to record the linear scale before and after log and the time difference curve in the acoustic variable density log.
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摘要阐述了声波变密度测井时对其进行测前、测后线性刻度及记录时差曲线的必要性。 |
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It is necessary to remove the dirt and pathogenic bacteria, to avoid contaminating germ free or sanitizing articles and to avoid infection and cross-infection.
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答：除去手上的污垢及污染的致病菌，避免污染无菌物品或清洁物品，避免感染和交叉感染。 |
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It is necessary to review the old article before start learning new article.
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问题2再开始新的一课前复习旧的一课是必要的。 |
