Sometimes' t's aren't pronounced at all, especially in words with two 't's grouped together (this is known as the glottal stop, and is common in American English pronunciation).

尽管在一些地方会发成h - yuman be - in。有时字母t根本就不发音，尤其是两个T在一起的时候(这叫作塞音停顿，在美国英语里面很普遍)。