对于许多树木来说——常绿的针叶树是一个例外——最好的策略是在春天之前放弃光合作用。

For many trees—evergreen conifers being an exception—the best strategy is to abandon photosynthesis until the spring.

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在1956年的春天之前，他已经拥有一小群职员并且开始着手进行研发。

By the spring of 1956 he had a small staff in place and was beginning to undertake research and development.

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补给物品无法运送到冰封的港口，在春天之前，有些商店的货品可能几乎都要卖光了。

Supplies couldn ' t be delivered to the icebound harbors , and by early spring , some stores would be almost empty.

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