十万个为什么·科学阅读30篇（4）

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为什么沙漠植物只在罕见的暴雨后开花？

Desert plants like ocotillo and desert lilies remain dormant for months or even years underground.
Their seeds contain biochemical inhibitors that prevent germination until heavy rain washes them away.
Soil moisture must reach a critical threshold to trigger hormonal signals for rapid growth.
This adaptation avoids wasting energy on flowers if rain is too brief or shallow for root establishment.
Some species bloom within 48 hours after rainfall, completing their entire life cycle in under six weeks.
Bees and moths synchronize their activity with these short-lived floral displays for pollination.
Scientists study seed coat chemistry to understand how drought tolerance evolved in arid zones.
Climate change may disrupt this timing by altering rainfall intensity and seasonal distribution.
Remote sensing helps track bloom events across vast deserts where ground observation is difficult.
These ephemeral blooms support entire food webs, including insects, birds, and small mammals.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

Bees and moths synchronize their activity with these short-lived floral displays for pollination. 蜜蜂和蛾类会同步其活动，趁这些短暂的花期完成授粉。
Climate change may disrupt this timing by altering rainfall intensity and seasonal distribution. 气候变化可能通过改变降雨强度和季节分布，扰乱这一物候节律。
These ephemeral blooms support entire food webs, including insects, birds, and small mammals. 这些转瞬即逝的花期支撑着包括昆虫、鸟类和小型哺乳动物在内的完整食物网。

这篇中文题目最接近哪一句？为什么沙漠植物只在罕见的暴雨后开花？一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？丝兰和沙漠百合等沙漠植物可在地下休眠数月甚至数年。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why Do Desert Plants Bloom Only After Rare Heavy Rains? How to cook noodles A maths worksheet

Bees and moths synchronize their activity with these short-lived floral displays for pollination.

Bees and moths synchronize their activity with these short-lived floral displays for pollination.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：Bees and moths synchronize their activity with these short-lived floral displays for pollination.