【知识点详解】
1. **动词短语及搭配**
- `found` 在句子中用作过去分词，表示“建立”，与`founded`同义，构成被动语态，如"The company, founded in 1996, is a private stock enterprise."
- `replace sth. with/by sth.` 表示“用...替换...”，在句中表示不吃饭而用零食代替是不明智的，如"It's not a good idea to miss meals and replace them with/by snacks."
2. **名词与形容词的转换**
- `achievement` 是名词，表示“成就”，如"They have made a great achievement in keeping the peace in the world."
- `evident` 是形容词，意为“明显的”，在句中作表语，如"It's evident that walking may be an effective way if you really want to lose weight."
3. **固定搭配和短语**
- `hold the belief` 表示“持有信念”，如"He holds the belief that he will be successful some day."
- `believe in oneself` 意为“相信自己”，在建议中强调自信的重要性，如"You should believe in yourself, or your dream will never become a reality."
- `concentrate on` 表示“集中精力于...”，用于描述科学家们专注于解决技术难题，如"The scientists believe in their ability to solve them in a short period of time, which is why now, a group of experts are concentrating on the breakthroughs."
4. **介词短语**
- `in total` 表示“总计”，用于介绍中国准备向太空发射的空间实验室总数，如"China has been preparing to send two to three space laboratories in total skyward."
- `in space` 表示“在太空中”，描述中国计划2020年建造的空间站的位置，如"This is in preparation for its plan to build a space station in space in 2020."
5. **动词时态与非谓语动词**
- `taking off` 作为非谓语动词，表示即将进入太空的状态，如"Before its taking off into space, China still needs some technological breakthroughs."
- `welcome sb. with sth.` 表示“用...欢迎某人”，这里可以改为并列结构或伴随状语，如"Mr Brown stood at the door, welcoming newcomers with a large smile." 或 "Mr Brown stood at the door, and welcomed newcomers with a large smile."
6. **条件状语从句**
- `now that` 引导原因状语从句，表示“既然”，如"Now that China is in the second phase of a three-step plan for its manned space flight program..."
7. **动词短语**
- `take photographs of` 表示“拍摄...的照片”，如"The news media will take photographs of the launch at the scene."
- `be similar to` 意为“与...相似”，用于比较中国在建设空间站时可能面临的困难，如"As for the construction of space station, China still faces difficulties that are similar to what we are facing now in launching the space laboratories."
以上就是从题目、描述和部分内容中提取的IT知识相关的点，虽然这些知识点主要涉及英语语法、词汇和表达，但它们对于理解和应用语言，尤其是科技英语，具有重要意义。学习这些知识有助于提升阅读、写作和交流能力，尤其是在科技报告、论文或国际交流中。
