韦伯词典中美式音标中的“除号”是什么意思?比如查Library这个词,后面音标显示\ˈlī-ˌbrer-ē,-ˌbre-rē; British usually & US sometimes -brər-ē; US sometimes -brē,÷-ˌber-ē,-ˌbe-rē\

问题描述:

韦伯词典中美式音标中的“除号”是什么意思?
比如查Library这个词,后面音标显示\ˈlī-ˌbrer-ē,-ˌbre-rē; British usually & US sometimes -brər-ē; US sometimes -brē,÷-ˌber-ē,-ˌbe-rē\