您要查找的是不是：
- A persistent or multifaceted problem that cannot be eradicated by a single effort. 难以根绝的祸患难以轻松解决的、头绪多的、复杂的问题
- Just as no one grows fat at one sitting, no success can be attained with one single effort. 正如一口吃不成个胖子一样,成功不能一蹴而就。
- When the boys were broad jumping,Lincoln would wait until every one had done his best,then beat them all with a single effort. 当男孩子跳远时，林肯会等到每个人都已经跳出最好成绩，然后他只要一跳就将他们全部击败。
- When the boys were broad jumping, Lincoln would wait until every one had done his best, and then beat them all with a single effort. 当男孩子跳远时，林肯会等到每个人都已经跳出最好成绩，然后他只要一跳就将他们全部击败。
- The letter was written on a single sheet of paper. 这封信只用一张纸写成。
- One single, second class, to winchester, please. 买一张去温撤斯特单程二等票。
- He got over the stream with a single leap. 他一跃就跳过了小溪。
- A single fixed pulley does not help to save effort. 一个单独的固定的滑轮不能帮助节省气力。
- The bridge crosses the river in a single span. 河上那座桥是单跨桥。
- Do you want a single or a return ticket? 你要单程票还是往返票?
- Is the material single width or double width? 这幅料子是单幅的还是双幅的？
- I have had to work for every single penny I earned. 我挣的每一便士都是辛苦工作得来的。
- The huntsman fired a single shot at the lion and settled its hash. 猎人朝那只狮子开了一枪，把它打死了。
- Five twenties and ten single, please. 请给我5张20元的和10张1元的。
- She wore a single orchid on her evening dress. 她在晚礼服上缀着一朵兰花。
- Up to yesterday, I thought he was single. 直到昨天，我一直以为他是独身。
- Can you let me have a room with two single bed? 可以给我一间两张单人床的房间吗？
- One of four offspring born in a single birth. 四胞胎之一一胎出生的四个孩子中的一个
- For strong sewing use double, not single thread. 为了缝得牢，用双线，而不要用单线。
- A single grain of a cereal plant. 谷粒禾谷类作物的一个颗粒
