《梁书·列传·卷三十七》
太宗听了脸面失色，问他原故。
太宗失色，问其故。
Taizong's face fell when he heard this, and he asked why.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 太宗失色，问其故。 [/INST] Taizong's face fell when he heard this, and he asked why.</s>
Explain the meaning of this Classical Chinese passage in English: 太宗失色，问其故。
user
Taizong's face fell when he heard this, and he asked why.
assistant