●environmental 環境的
An environmental group and medical experts warned that air-conditioned rooms are so cold that could cause health problems.
環保團體與醫療專家提醒，空調房間溫度太冷，可能引發健康問題。

Temperatures, which are as low as 17 degrees Celsius, could bring on headaches, cause breathing problems even allergic *reactions.
溫度低到攝氏十七度，可能引發頭痛、呼吸問題，甚至過敏反應。
1.reaction　n. 反應

2.react　 　v. 反應
John reacted to the scandal with much surprise.
約翰對這件醜聞大感驚訝。

3.reactionary　a. 保守的、復古的 
She prefers reactionary clothing.
她偏好復古的服飾。

4.reactive　　a. 反應的
The reactive properties of chemicals vary widely.
化學品的反應特性變化多端。
5.reactor　n. 原子爐
The reactor can potentially produce more fuel than it consumes.
這座原子爐可生產超出它消耗的燃料。

Temperature rise would be *beneficial to the environment, as less fuel would be used resulting in lower emissions of carbon dioxide, a major cause of global warming.

溫度調高對環境有益，因為使用較少的燃料可降低二氧化碳的排放（全球暖化的主因）。
1. beneficial　a. 有益的

2. beneficence　n. 善行
The enterpriser's beneficence is well-known.
這位企業家的善行是眾所皆知的。

3. beneficiary　n. 受益人
Beneficiary must sign on the certificate.
受益人必須在證書上簽字。

4. benefit　v. 獲益
The young investor has benefited very much from experience.
這位年輕投資人從經驗中獲益良多。