(dated)used for politeness before making a suggestion or expressing an intention
(舊)請(qǐng)?jiān)试S我（提出建議或表達(dá)意圖之前的禮貌語）
permit me to correct you.
請(qǐng)?jiān)试S我糾正你的錯(cuò)誤。
if the specified thing does not prevent one from doing something
如果…許可的話，如 果…允許的話
weather permitting, guests can dine outside on the veranda.
天氣許可的話，客人可以在外面的陽臺(tái)上就餐。