protection span的用法和樣例：
例句
- Most wings have a different chord at different positions along their span.
大多數機翼在他們跨徑的不同位置有著(zhù)不同翼弦長(cháng)度。 - Assyrian art also associates the winged disc with divinity and divine protection of the king and people.
亞述人的藝術(shù)也與有翼的圓盤(pán)連結，象征著(zhù)神和神保護國王和人民。
