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																										- 这个街区的供暖系统不太好用。
The heating system in this block doesn't work well. 
																										- 工人们装好了供水系统。
The workmen fixed the water system. 
																										- 我们太阳系的行星有水星、金星、地球、火星、木星、土星、天王星和海王星。
The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. 
																										- 这个暖气系统有自动化的温度调节系统。
This heating system has an automatic temperature control. 
																										- 系词将一个句子的谓语和主语连起来的动词,如be或seem的一种形式
A verb, such as a form of be or seem, that identifies the predicate of a sentence with the subject. 
																										- 工人们正在安装供暖系统。
The workers are installing a heating system. 
																										- 你知道怎么登录进入这个系统吗?
Do you know how to log in to the system? 
																
							 
						 
					 
				 
			
			 
		
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