请大神帮我看看这句英语有没有语法错误~
Refutingtheauthor’sviewpoint,thelecturer
pointsoutseveralproblemswiththeuseofhydrogen-basedfuel-cellenginesin
supportofherclaimthatsubstitutingthemforinternal-combustionenginesis
technologicallyunfeasible,environmentallyunfriendlyandeconomically
unviable.
word上建议修改……不知该不该改,怎么改.求教~