I will be hosting a seminar on machine learning this afternoon at the conference room. Everyone is welcome to attend.
a seminar某個議題的討論會 = a seminar
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 greenhuse effect, which leads to melting of glaciers, which leads to rising sea levels.