positive

正面的、积极的、乐观的

She kept a positive attitude throughout her long recovery.

在漫长的复原过程中，她始终保持乐观的态度。

肯定的、确定的、有把握的

Are you positive that you locked the front door?

你确定你把前门锁好了吗？

有益的、有建设性的

The new policy had a positive effect on air quality.

新政策对空气品质产生了正面的影响。

阳性的医学

Two of the players tested positive for the flu.

其中两名球员的流感检验结果呈阳性。

正的、正极的数学、物理

Connect the red wire to the positive terminal of the battery.

把红色电线接到电池的正极。

明确的、确切的正式

We still have no positive proof that he was there.

我们仍然没有确切的证据证明他当时在场。

优点、好处、正面因素常用复数

Let's focus on the positives before discussing the problems.

在讨论问题之前，我们先来谈谈优点。

阳性、阳性反应医学

The lab reported three positives out of forty samples.

实验室在四十个样本中验出三个阳性。

正片摄影

He made a positive from the old negative in the darkroom.

他在暗房里把那张旧底片洗成正片。