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今日长难句：

However, the " screen time" hypothesis, advanced by researchers such as Jean Twenge, is that electronic devices and excessive time spent online may have reversed these trends in recent years, causing problems for young people's psychological health.

然而，琼·特文格等研究者提出的“屏幕时间” 假设则认为，近年来电子设备以及过长的上网时间可能已扭转了这些趋势，导致年轻人心理健康出现问题。

分析：

主语：the " screen time" hypothesis

后置定语：advanced by researchers such as Jean Twenge

谓语：is

表语从句：that electronic devices and excessive time spent online may have reversed these trends in recent years, causing problems for young people's psychological health

表语从句中：

主语：electronic devices and excessive time

定语：spent online

谓语： may have reversed

宾语：these trends

时间状语：in recent years

结果状语：causing problems for young people's psychological health

核心词汇：

1. hypothesis n. 假设；假说

【常见搭配】hypothesis test 假设检验；假设测试

2. advance n. 前进；预付款；发展；增长 v. 预付；提出；使...前进；将...提前

【常见搭配】advance in something 在...有进步

【相关俚语】in advance (of something) 提前

3. electronic adj. 电子的；电子器件的

【同根词】electric adj. 电动的；电的

electronical adj. 电子的

4. excessive adj. 过度的；过分的；极度的

【同根词】excess n. 过分；过量；过度

【常用短语】excessive profit 超额利润；暴利

5. reverse v. （使）反向；（使）倒转；彻底改变；推翻

【派生词】reverser n. 换向开关；换向器

【反义词】obverse n. 对立面；正面；主要的一面

【相关俚语】go into reverse 出现逆转；向相反方向发展

6. psychological adj. 心理的；精神的

【同根词】psychology n. 心理学；心理，心理特点

【近义词】mental adj. 精神的；头脑的；心理的；智力的；精神病的

【反义词】physical adj. 身体的；物质的；物理的

【常用短语】psychological quality 心理素质

psychological characteristics 心理特点

今日练习：

Having ignored it for years -- in 2020 femtech received only 3% of all health-tech funding, and a modest $14bn has been invested in it globally to date -- venture capitalists are at last waking up to the opportunity.

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