您要查找的是不是：
- To engage in hazardous activities; take risks. 冒险参加冒险性活动；担风险
- As to the author of the book, I will hazard a guess. 关於这本书的作者，我来试猜一下。
- The car had its hazard warning lights on. 这辆汽车亮起了危险信号灯。
- Smoking is hazardous to your health. 抽烟有碍你的健康。
- The office has been humming with activity. 办公室一直忙着搞活动。
- Wet roads are a hazard to drivers. 道路湿滑会对司机构成危险。
- The threat of war has depressed business activity. 战争的威胁使经济萧条。
- If I might hazard a guess, I'd say she was about30. 要是让我猜的话，我说她大概。
- There has been a lot of activity in the town today. 今天市中心相当热闹。
- Smoking is a serious health hazard. 吸烟严重危及健康。
- The town was humming with activity. 该市镇生气勃勃，呈现一片热闹的景象。
- Stamp collecting is my favorite activity. 集邮是我最喜爱的消遣。
- The store was a scene of great activity. 这家商店顾客盈门。
- He once engaged in anti-government activity. 他一度从事反政府的活动。
- Rock-clibmers sometimes hazard their lives. 攀登岩石的运动员有时要冒生命危险。
- The office is humming with activity. 办公室里一片忙碌。
- A center of interest or activity. 中心兴趣或活动的中心
- For professional footballers, injuries are an occupational hazard. 对于职业足球运动员来说，受伤是职业本身带来的危险。
- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
- A place filled with mud or quicksand that is a hazard to cattle. 沼穴充满泥浆或流沙的地方，可对牛群构成威胁
