结果：牡丹皮入药以连丹皮为优。
RESULTS: Paeonia suffruticosa Andr. with the epidermis is better than others.
单独的字词，以连字符和尽量不要使用太多的连字号。
Separate words with a hyphen and try not to use too many hyphens.
你14岁时，她掏钱让你去参加为期一个月的夏令营， 你却以连一封信都忘记给她写来感谢她。
When you were 14, she paid for a month away at summer camp. You thanked her by forgetting to write a single letter.
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