unassisted

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This structural transformation is rarely the product of unassisted market forces.
这种结构性变革很少是独立的市场力量的结果。
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She will sail solo and unassisted but will be in constant contact with her support team via radio, email and a blog.
她将在无协助情况下独自航行，但同时也将通过无线电、邮件及博客与她的支持团队保持联系。
The object of the old metaphysical theology was to see how far unassisted reason could go in the knowledge of God.
旧形而上学中的理性神学部分，其目的在于确定理性的本身究竟能够认识上帝到什么限度。

Karcher's RoboCleaner is marketed as being able to run for up to nine hours unassisted and unattended.
FORBES: Magazine Article
With plants in place and seed banks built up in the soil, such a greening might continue unassisted.
ECONOMIST: Ascension Island
Known as the A2B, it can hit 20 mph unassisted and travels up to 43 miles on a charge.
FORBES: Magazine Article