positive catalyst

例句：

1. 1. The new policy ispositive for the development of our city.
   这项新政策对我们城市的发展是积极的。
2. 2. Theteam's performance was positive, butthey still need to improve their skills.
   团队的表现是积极的，但他们还需要提高技能。
3. 3.The weather forecast is positive for tomorrow,with clear skies and warm temperatures.
   天气预报明天是晴朗的，温度温暖。