我认识马庆云已有大约十年时间。
有大约十年时间的间歇。
该疫苗的开发从一开始到完成用了不到十年时间，这是创纪录的，在花费方面是通常情况下一个产品从开发到走向市场所需经费的大约十分之一。
The vaccine was developed, from start to finish, in less than a decade, in record time, and at about one-tenth of the cost usually needed to bring a product through development to the market.
大约十年前，在她计划考驾照之前，Cha女士花费了三年时间学习理发师执照。
About a decade ago, before embarking on her quest for a driver's license, Ms. Cha spent three years studying for a hairdresser's license.
大约十年前，在她计划考驾照之前，Cha女士花费了三年时间学习理发师执照。
About a decade ago, before embarking on her quest for a driver's license, Ms. Cha spent three years studying for a hairdresser's license.
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