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- In this thesis, the reaction such as tritylation, p-tosylation, chlorization and acetylation were used in the selective protection of the hydroxyls of carbohydrate. 本论文通过三苯甲基化反应、对甲基苯磺酰化反应、氯代反应及乙酰化反应研究了糖中羟基的选择性保护，同时还研究了糖番的合成及甲壳素的降解反应。
- They netted the fruit trees to protect them from birds. 他们用网覆盖住果树以使其免遭鸟害。
- How can we protect our computer files? 我们怎样才能保护我们的计算机数据？
- She helped to select a dress for Ruth. 她帮着给露丝选了一件衣裳。
- She is selective in the dresses she wears. 她对于自己穿的衣服精挑细选。
- A plastic cover protect the computer. 这台计算机由一个塑料防护罩盖着。
- It's our duty to protect the saplings. 保护树苗是我们的责任。
- In case of flood, the dam can protect us. 在发洪水的时候，大堤可以保护我们。
- The Principle to Select Protection Relay for Motor 如何选择电动机保护继电器
- A law was passed to protect alien property. 通过了一项法律保护外国侨民的财产。
- A few protection types for VCB operation over-voltage are analyzed and compared, and some suggestions for selecting protection types in engineering design are given. 分析比较了在高压厂用电系统中保护真空断路器操作过电压的几种方式，提出在工程设计中采用何种保护方式的建议。
- An umbrella will protect you from the rain. 雨伞可以保护你不致雨淋。
- She only stays at select hotels. 她只住一流旅馆。
- These policemen wear helmets to protect them. 这些警察戴着头盔保护自己。
- He raised his arm to protect his child from hurt. 他伸出手去，保护他的孩子免受伤害。
- Can student willfully select the course? 学生可以随意选择课程吗？
- These gallant soldiers will protect our country. 这些勇敢的士兵会保卫我们的国家的。
- A select group were invited to the wedding reception. 一群经过挑选的人士被邀请参加婚宴。
- The local authorities protect the family from inquisitive tourists. 地方当局保证这个家庭不受爱好寻根究底的旅游者的纠缠。
- I'm very selective about the people I associate with. 我与他人来往极慎重，不滥交。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
