The contractor emailed a quote for repairing the cracked buttress on the warehouse wall.

承包商寄來一份報價單，說明修補倉庫牆上那座裂開扶壁的費用。

During the meeting, engineers explained why each buttress must be inspected before winter.

會議中，工程師說明為何每座扶壁都必須在冬天前檢查。

Our tour guide pointed out the flying buttresses that support the old cathedral's walls.

導遊指出那些支撐古老大教堂牆面的飛扶壁。