We sell five-day unlimited Internet access plans at NT$450 each, including NT$50 credit for voice.
 credit for voice credit for phone calls例句的意思是: 我們有販售5日上網無限卡450元（贈送通話費50元）
這是一個連環問題: 燃燒石油導致二氧化碳增加，二氧化碳增加導致溫室效應，溫室效應導致冰層融化、海平面上升。 (請填空)
This is a chain of problems. Burning oil leads to increase in carbon dioxide, which leads to the greenhouse effect, which leads to melting of glaciers, which leads to rising sea leves.