One may eat and drink at any time during the night "until you can plainly distinguish a white thread from a black thread by the daylight; then keep the fast until night".
A: “直到你能借助白天的光线清楚地分辨出一条白线和黑线,然后一直不吃饭,直到晚上。”
B: “直到你能借助晨光清楚地分辨出白线和黑线,然后就要保持迅速的状态一直到晚上”
A: “直到你能借助白天的光线清楚地分辨出一条白线和黑线,然后一直不吃饭,直到晚上。”
B: “直到你能借助晨光清楚地分辨出白线和黑线,然后就要保持迅速的状态一直到晚上”