一些美国的医生正考虑着他的技术，而其很有前景，而且两家美国医院正在对一小部分志愿者进行考察，其中大多数是孩子。
Some American doctors consider his technique experimental but promising, and two U.S. hospitals are carrying out trials on a small number of volunteers, mostly children.
一些美国的医生正考虑着他的技术，而其很有前景，而且两家美国医院正在对一小部分志愿者进行考察，其中大多数是孩子。
Some American doctors consider his technique experimental but promising, and two U.S. hospitals are carrying out trials on a small number of volunteers, mostly children.
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