Approach the fountain and overhear a conversation regarding a missing basement key and then talk to Matisse.

走近喷泉和无意中听到一个关于失踪的地下室交谈键，然后跟马蒂斯。

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There is a locked door from the street that leads to the corridor where the basement door is (I don't even have a key for this).

房子临街有一个锁著的门，打开门就是一个走廊。

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The compositions and formation history of basement metamorphic rocks are the key to understanding crust evolution.

基底变质岩的成分和形成时代对揭示地壳演化至关重要。

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