secretive

adj.

遮遮掩掩的，守口如瓶的，秘密的，偷偷摸摸的；[生]（促进）分泌的；嘴紧；鬼头鬼脑

1. I don't know why Fred is always secretive as regards his family.
   我不知道为什么凡涉及到他的家，弗雷德总是保密。
2. Why was I always alone and secretive?
   我为什么老是独自一个人偷偷摸摸的呢?

Bulimia: The secretive syndrome
Secretive bacterial pathogens and the secretory pathway
Secretive Marsh Bird Species Co-Occurrences and Habitat Associations Across the Midwest, USA
A Sampling Design Framework for Monitoring Secretive Marshbirds
Use of playback recordings in sampling elusive or secretive birds
Secretive females or swaggering males? An assessment of the quality of sexual partnership reporting in rural Tanzania
Status and Distribution of Breeding Secretive Marshbirds in the Delta of Arkansas
Camera-trap study of ocelot and other secretive mammals in the northern Pantanal
Clouded leopards, the secretive top-carnivore of South-East Asian rainforests: their distribution, status and conservation needs in ...
Recurrent ecological adaptations revealed through a molecular analysis of the secretive cophyline frogs of Madagascar.