The prosecution's main witness was close to tears as she described the assault.原告方主要证人在对袭击作描述时几乎要落泪了。The testimony of the chief witness doesn't stand up to scrutiny.主要证人的证词经不起推敲。The main witness was probably lying, but in any event the prosecution's case was very weak.主要证人很可能是在说谎，但无论如何，控方提起诉讼的依据很不充分。