无错误

Linguistic indices contain the ratio of error-free T-unit (REFT) and subordinate clauses per T-unit (SCT).

语言指标包括错误T-与全部T-比(REFT)和全部从句与全部T-比(SCT)。

Please note that it is perfectly acceptable to have a Pembroke Welsh Corgi that is black and tan with no white, but a Pembroke Welsh Corgi that is black and white with no tan present is a mismark.

请注意它是可接受完美PWC,它有黑和白，但是PWC这又黑和白是错误标记。