Isaiah continues to describe a time in the future when God will judge the earth. Prophets sometimes describe a future event as something in the past or in the present. This emphasizes the event certainly will happen. (See: [[rc://en/ta/man/translate/figs-pastforfuture]])
# In the city is left a desolation
The abstract noun "desolation" can be stated as "desolate" or "empty." AT: "The city is desolate" or "The city is left empty" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
# In the city
This is not a specific city but cities in general. (See: [[rc://en/ta/man/translate/figs-genericnoun]])
# as when an olive tree is beaten, as the gleanings when the grape harvest is done
This compares the nations after Yahweh devastates the land to trees and vines after their fruit has been picked. This means there will be very few people left in the land. (See: [[rc://en/ta/man/translate/figs-simile]])