ほら、傘持って行きなさい! 今日は雨降るわよ!
Here, take an umbrella with you! It's going to rain today!

 この傘好きじゃない。他の傘、買ってよ。
I don't like this umbrella. Buy [get] me a different one [umbrella].

 これでいいのよ。あなたはいつも傘をなくすから、いいものは買いたくないのよ。
This (one) ^will do [is just fine]. You always lose your umbrellas, so I'm not going to buy [get] you a good one.