Translation of Three Idioms in the Next Sentence of Two Xiehouyu

If you don't attack, you will lose. Explain that the defense is weak and vulnerable to attack. It also means that the arguments and plots are full of loopholes and cannot withstand refutation.

Talking and joking are not frivolous.

No kidding. Describe a serious attitude. Source: The Book of Rites by Dai Sheng in the Western Han Dynasty.

be in a great panic

No shivering from the cold. Of trembling caused by fear. From Historical Records Biography of Cool Officials

Calendar every other year

Can't turn it over/look.

One year after the Gregorian calendar. In the new situation, we will no longer compare outdated things or old experiences. Originally refers to the almanac promulgated by the Qing court, also known as the imperial calendar, and later refers to the almanac. From [Qing] Xia Jinglian's Ye Lu Ci.

Lice on the bald head

Obviously, you can't hide.