Narcissa murmured a word of thanks, whilst（=while) Bellatrix said nothing, but continued to glower at Snape.
Narcissa murmured a word of thanks, whilst（=while) Bellatrix said nothing, but continued to glower at Snape.
纳西莎嘟哝了一句“谢谢”，贝拉特里克斯什么也没说，继续狠狠地瞪着斯内普。