Correct

一叶落而知天下秋

/ yī yè luò ér zhī tiān xià qiū /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/一叶落而知天下秋-Chinese-idioms-Cchatty-8c44750d-276b-4ee2-b390-1f0f2f2935a8-1612776077.jpg

Collocation

1
做到了一叶落而知天下秋
2
人常说一叶落而知天下秋
3
常言道一叶落而知天下秋
4
可谓一叶落而知天下秋
5
俗话说一叶落而知天下秋

Definition

一叶落而知天下秋:

Literally means:

the falling of one leaf heralds the autumn

Actually means:

a straw shows which way the wind blows; a small sign can indicate a great trend

This phrase literally means that seeing one leaf falling, one knows the autumn is coming.

Figuratively it means that the whole trend of development of something can be seen from minute sign.

看到一片树叶落下来,就知道秋天来了。

比喻从某些细微的迹象,可以看出整个形势的发展趋向。

Example

Used as a minor sentence, predicate or object. (作小句、谓语、宾语)
1
huàshuō
俗话说
luò
ér
zhī
tiānxià
天下
qiū
  
,
jiā
yínháng
银行
dǎo
倒闭
shi
ǒurán
偶然
de
  
,
zhè
shì
预示
zhāo
xīn
de
lún
jīng
经济
shuāituì
衰退
kāishǐ
开始
le
  

As the saying goes, it is no accident that the bank failed in the autumn, which heralds the beginning of a new recession.

2
shàn
善于
zhuāzhù
抓住
shìchǎng
市场
yào
需要
de
xīn
dòngxiàng
动向
  
,
wèi
可谓
zuòdào
做到
luò
ér
zhī
tiānxià
天下
qiū
  
,
suǒ
所以
zài
jiè
企业界
hěn
yǒu
yǐngxiǎng
影响
  

He is good at grasping the market needs of new developments, can be said to do a leaf fall and know the autumn, so in the business community has a lot of influence.

3
Jǐnguǎn
尽管
diànyǐng
电影
shàngzuò
上座率
xiàjiàng
下降
de
shì
趋势
  
,
dàn
luò
ér
zhī
tiānxià
天下
qiū
  
,
men
我们
jīng
已经
kànchū
看出
zhège
这个
ōu
地区
diànyǐng
电影
shìchǎng
市场
de
zǒng
总体
zhuàngkuàng
状况
  

Although there is little decline in movie seating, we've seen the overall state of the film market in the region as the fall has fallen.