四个团队试图使燃油消耗或者噪音目标满足NASA的概念，但不是两者皆满足。

The four teams managed to meet either the fuel burn or the noise goal with their concepts, not both.

youdao

Maybe it could refer to either the poet or the sun throughout the entire line, if you think of the mantle blue as being the actual sky that the sun is able to twitch over his shoulder.

或者两者皆可,从整句的行文看来，如果你们把蓝色的丝巾看作是真实的天空的话,那么太阳的确是能够在他的肩上轻轻颤动。

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