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1·Rescue sites will often be unstable and hide many dangers: broken glass, protruding nails, weakened floors or stairs, downed electrical wires, escaping gas, broken sewer and water pipes.

需救援的地点往往不坚固，且潜藏着危险：碎玻璃，扎出来的钉子，脆弱的地板和楼梯，掉落的电线，泄漏的燃气，破损的下水道和水管。

2·Trimethylamine (TMA) gas is the main gas come from deterioration of fish and one of the major odor gases existing in urban sewer.

三甲胺(TMA)气体是鱼类水产品变质后释放的主要气体，也是城市下水道释放的主要恶臭气体之一。

3·Trimethylamine (TMA) gas is the one of major odor gases existing in urban sewer. Recent researches in TMA gas sensor focus on inspecting freshness of fish.

三甲胺（TMA）气体是主要的城市下水管道恶臭物质之一，目前对三甲胺气敏材料的研究主要集中在鱼鲜度的测定。

4·The thesis demonstrates the feasibility of natural ventilation to control concentration of noxious gas in the sewer tunnel.

并论证利用自然风稀释污水隧道内有害气体浓度的理论可行性。

5·The product mainly uses in making the yacht the sewer pipe the gas line the cooling tower the wind-driven generator fan blade.

产品主要用于造游艇，下水管道，天然气管道，冷却塔，风力发电机的风叶。