You might be worried about these two forms – the one in which the noun or noun phrase comes in the middle of the phrasal verb and the one in which the noun or noun phrase comes after it.

你可能会担心这两种形式——名词或名词短语位于动词词组形式，和名词或名词短语位于动词词组形式。

It's called the mid-roll even though it's not in the middle of the show.

尽管不在节目，这种广告形式仍被称“广告”。

I mean, why wouldn't there be worrying if there weren't intermediates?

我意思是，如果没有过渡形式，什么不会担心呢？

In the first place, it should always be borne in mind what sort of intermediate forms must, on the theory, have formerly existed.

首先，应该始终牢记在理论上必须存在什么样形式。

Natural selection, as has just been remarked, leads to divergence of character and to much extinction of the less improved and intermediate forms of life.

正如刚才所说， 自然选择导致性格分化， 并导致改良程度较低和生命形式大量灭绝。

Hence all the intermediate forms between the earlier and later states, that is between the less and more improved states of a the same species, as well as the original parent-species itself, will generally tend to become extinct.

因此，早期和晚期状态之所有形式，即同一物种改良程度较低和改良程度较高状态之所有形式，以及原始亲本物种本身， 通常都会趋于灭绝。