?
查询技巧:
1、输入单个单词准确查询。
2、使用%模糊查询,匹配任意长度字符:
   %a    以a结尾的单词;
   ab%    以ab开头的单词;
   %ac%    含有ac的单词。
3、使用_模糊查询,匹配单个任意字符:
   _a_    三位且a在中间的单词;
   _ad    三位且ad结尾的单词;
   ac_    三位且ac开头的单词;
   _a    两位且a结尾的单词;
   a_    两位且a开头的单词。
4、带连字符-的单词,需含-字符才能模糊查询,如well-know需输入 well-% 。
5、在手机键盘上,如果g上有%和v上有_,则可长按输入。

downhill

英 / ˌdaʊnˈhɪl; ˈdaʊnhɪl /
美 / ˌdaʊnˈhɪl /
adv. 向下;向山下
adj. 下山的;下坡的;下斜的
n. 高山速降(比赛)

复数:downhills

1. Their marriage went downhill after the first child was born.
自第一个孩子出生后他们的婚姻便开始走下坡路了。
2. I started work as a journalist and it was downhill all the way for my health.
我开始当记者后,身体每况愈下。
3. On the descents, cyclists spin past cars, freewheeling downhill at tremendous speed.
在下坡道上,自行车手们飞快地掠过汽车,靠惯性极速冲下山去。
4. His health was getting steadily worse.; His health went steadily downhill.
他的健康每况愈下。
5. If you head downhill and follow any H2O you find, you should eventually see signs of people.
如果你朝下坡的方向,跟着发现的水源走,应该最终会看到人烟。