Frank's endorsement energized fans, but it also challenged the long-standing cautiousness the post office had around stamps.

弗兰克的认可激发了粉丝的热情，但也挑战了邮局长期以来对邮票的谨慎态度。

I only fear that the sort of cautiousness, to which you, I imagine, have been alluding, is merely adopted on his visits to his aunt, of whose good opinion and judgment he stands much in awe.

我只怕他虽然收敛了一些（你大概就是说他比较收敛了一些吧），事实上只不过为了要在他姨母面前做做幌子，让他姨母看得起他，说他的好话。