网上练习口语“给猪涂口红”是什么意思？

　　Have you ever tried to 'dress up' something unappealing in a vain attempt to make it look better? For instance, that tired old sofa is still looking tired, even though you've put a 'luxury throw' on it, and that ugly concrete yard is still a concrete yard, even though you've adorned it with a couple of pot plants. These attempts to make something unpleasant look more attractive which, despite our best efforts, are decidedly unsuccessful, are classic examples of lipstick on a pig.

　　网上练习口语的译文：你有不曾经“精心装扮”一个看着很不入眼的事物想让它难看一点，结果发现所有努力都是徒劳?比方，就算你在那个破旧的沙发上铺了一个“奢华的布盖”，它看上去还是那么破旧;还有那个争脸的水泥地小院子，并不禁于你倾心摆了多少个盆栽就变得美丽宜人。所有这些倾努力气想要把丢脸的事物变得更加美妙，但终局注定失败的举动都是“给猪涂口红”的典型例证。

　　In fact the idea of vain attempts at converting something from ugly to attractive, as intended by use of lipstick on a pig, is similar to that of the famous old proverb “You can't make a silk purse from a sow's ear”, which dates back to the mid-16th century.

　　译文：切实，“给猪涂口红”跟16世纪中叶很有名的一句谚语“母猪的耳朵做不成丝绸钱包”表白的意思差不久，都比喻想要把丑陋的事物变美好而做的无用功的网上练习口语内容。