“沉下”用英语怎么说？

有那么一会儿他让自己沉下心来仔细分析一下对她的感情。For a moment he allowed himself the indulgence of examining his feelings for her.他气得沉下脸来.His face darkened with anger.我们现在朝向加拉巴戈斯裂谷沉下.We are descending into the Galapagos Rift Valley....

“沉下”的拼音为：chén xià...