In general,the cylindrical roller bearings, belonging to axial discerptible bearing,are suitable only for sustaining radial loads.The contact of roller with race is linear.
圆柱滚子轴承一般只用于承受径向负荷,滚子与套圈滚道为线性
,
轴向可分离型轴承。
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Here on campus, for example, the COVID-19 pandemic highlighted the extraordinary usefulness of digital tools in sustaining our educational mission and allowing us to cope and connect with one another amid social isolation and hardship.
就拿我们学校来说,新冠疫情期间,是因为有了线上工具,我们才得以继续授课,维持学校

使命;并在困难
隔离期间联络、互相支持。
选 
" The mind wants to sample different things and see what's going on in your environment. And in some ways, sustaining attention on the same thing for very long periods of time is not necessarily a natural state, " Willingham says.
“大脑想要采样不同
事物,看看你周围发生了什么。在某种程度上,长时间专注于同一件事并不一定是一种自然状态,”威林汉姆说。
选)
真题
听 However, Dr Mehmood Khan, chief scientific officer, said the company had doubled research and development spending in the past five years and was " committed to sustaining investment" , adding that companies cannot cost-cut their way to increasing sales.
不过,该公司
首席科学官,穆罕默德·可汗博士表示,在过去5年中,百事公司
研发支出增加了一倍,并称该公司将“继续保持投资”。他补充说,企业无法通过削减成本来增加销售。
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