CLASSROOM Grammar Elite
for Junior Secondary Students
Words by Theme

Theme: Science and environment (p.45)

1. 
   Public health (n. phr.): the health of all the people in an area
   
   
   e.g.
   The worsening air pollution posed (構成) a serious threat (威脅) to public health (公共衛生).


2. 
   Diarrhea (n.): an illness in which the body’s solid waste becomes liquid and comes out of the body more often
   
   
   e.g.
   Researchers (研究人員) have developed new drugs to ease (緩解) the discomfort (不適) caused by diarrhea (腹瀉).


3. 
   Invention (n.): something that has never been made before
   
   
   e.g.
   Scientists are working on a multifunctional (多功能的) urban (城市的) cleaning machine. The invention (發明物) is going to be put into use by the end of this year.


4. 
   Sewage (n.): used water and human waste
   
   
   e.g.
   The new sewage (污水) system is automated (使自動化) so that the pipes (管道) will not clog up (堵塞).


5. 
   Research (n.): a detailed study of a subject to discover new information
   
   
   e.g.
   Environmental activists (環境運動人士) have done a lot of research (研究) on how to strike a balance (取得平衡) between urban development and nature conservation (自然保育).


6. 
   Breakthrough (n.): an important discovery that helps to improve a situation
   
   
   e.g.
   The government strictly (嚴格地) controls vehicle (汽車) exhaust (廢氣) emissions (排放量) and has made a breakthrough (突破) in purifying (淨化) the air.


7. 
   Wind-powered (adj.): relating to the energy that generates electricity using wind
   
   
   e.g.
   The new wind-powered (風力發電的) installations (裝置) on the hill is the main source of electricity (電力) for the residents (居民) of the town.