Standard Chinese (Mandarin) has stops and affricates distinguished by aspiration: for instance, /t tʰ/, /t͡s t͡sʰ/. In pinyin, tenuis stops are written with letters that represent voiced consonants in English, and aspirated stops with letters that represent voiceless consonants. Thus d represents /t/, and t represents /tʰ/.
Mandarin has stops and affricates that are distinguished by what? Tenuis stops have letters that are representative of English voiced consonant in what? What kind of stops in pinyin are written with letters that representative of voiceless consonants?