A La Nina watch is issued when a La Nina could soon form.

当拉尼娜现象有形成的可能时，就会启动拉尼娜监测程序。

Nina, have you had everything organized yet?

妮娜，一切都安排就绪了吗？

Nina, thanks so much for being here.

妮娜，非常感谢你能参加我们的节目。

I have two guinea pigs, Nina and Nibblets.

我有两只荷兰猪，分别叫尼娜和尼伯莱茨。

Nina was right. It's a loser case.

妮娜说得对，这个案子输定了。

Nina is evidently in serious trouble.

很明显地，妮娜闯了大祸。

The current La Nina is in its third year.

目前，美国已第三年出现拉尼娜现象。

Nina found extra copies. She wants you back now.

Nina找到多余的计划书了。她要你立刻回去开会。

Is it La Nina, polar vortex, stationary wave, or El Nino?

是拉尼娜现象, 极涡、驻波还是厄尔尼诺现象?

One of the most important reasons is a potential La Nina but what exactly is a La Nina.

最重要的原因之一是潜在的拉尼娜现象，那究竟什么是拉尼娜现象呢？