So far these transitional forms have not been found.
到目前为止，我们还没有发现鲸的过渡形式。
As patterns of opening process, bonded zone and export processing zone are transitional forms in nature.
保税区和出口加工区作为我国扩大开放进程中的一种模式，本质上都具有过渡性。
If their postulate were correct, many transitional life forms would have existed between the ancestor and the descendant's time.
如果他们的假设是正确的，许多过渡的生命形式应存在于其祖先和后裔的这段时间内。
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