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This pattern introduces the existence of a certain number of people or things that match a description. It is very common in news and formal writing to report statistics or categories, similar to 'there are ... that ...' in English.
"有15只股票呈现机构净买入，20只股票呈现机构净卖出。"
"共35只个股出现了机构的身影，有15只股票呈现机构净买入。"
分别 is used to match items in one group with items in another group one by one, in corresponding order. It is very common in lists, statistics, and reports. Learners should note that it often appears more than once in the same sentence when both the items and their figures are listed.
"当天机构净买入前三的股票分别是可川科技、菲菱科思、同有科技。"
"净流出金额分别是1.91亿元、1.73亿元、1.15亿元。"
在……内 means 'within' a certain time period or scope. It sets a limit by which something will happen or be achieved. In formal and business Chinese, it often appears with plans, forecasts, and goals.
"他认为客户对人工智能的需求将推动亚马逊云科技（AWS）在未来十年内实现年化销售额6000亿美元。"
"OpenAI承诺未来八年将在亚马逊云服务器上投入近1400亿美元。"
This is a formal comparison pattern often used in written Chinese. A + 高于/低于/远高于 + B means 'A is higher/lower/far higher than B.' The preposition 于 is more formal than 比 and is especially common in news, finance, and academic writing.
"远高于2025年约1300亿美元的总营收。"
"他认为客户对人工智能的需求将推动亚马逊云科技（AWS）在未来十年内实现年化销售额6000亿美元，远高于2025年约1300亿美元的总营收。"
由 introduces the agent, source, or driving force behind an action or result. In formal Chinese it often means 'by' or 'driven by.' It can mark who performs an action or what powers a system.
"帮助AWS客户构建由OpenAI技术驱动的定制化AI智能体。"
"以实现业务任务自动化。"
also pr. [di4] or [di5] in poetry and songs
institution
(used before a verb to indicate an action in progress)
in different ways; differently
to be (followed by substantives only)
cloud
stock (finance)
science and technology
classifier for birds and certain animals, one of a pair, some utensils, vessels etc
to achieve; to implement; to realize; to bring about
three
used in 上聲|上声[shang3 sheng1]
sum of money
to request
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