訳おねがいします
The chief attraction slang has for people is novelty. It is fun to hear an idea phrased in a new, unusual way. But after hundreds of repetitions, the novelty wears off: the slang loses freshness and sparkle. The history of most slang expressions is that die an early death. (A)That is one reason why slang is often ineffective in speach and inappropriate in writing that is meant to last for some time.
Then, too, a great many siang expressions are so general that they hardly have any meaning at all beyond a vague indication of approval or disapproval. Using such words adds no more to your speech or writing than dose calling everything you like "wonderful" and everything you dislike "awful". Words like "dreamy" and "crummy'' are slang of this kind and add little to style or meaning.
Slang should be used with caution. A safe prescription is this: in conversation with friends, use it, but in small doses. Use it even less frequently in informal writing, making sure that what you use is appropriate to the subject and will not annoy readers. Never use it in formal speech or writing.
If you read a great deal and listen with interest to the speech of people who use language well, you will gradually develop a reliable judgment about the appropriateness of slang. Then, when you feel sure a slang expression is effective, you will probably be right.
(A)thatが何を指しているのかもお願いします。
