Quadslope
四重積分
??? 情景例句
Ask him to stop by for a talk.
讓他過來坐坐，聊聊天。
He ran like hell.
他拼命跑。
For him, caves have the same peculiar fascination which high mountains have for the climber.
對洞穴探險者來說，洞穴有一種特殊的魅力，就像高山對登山者有特殊魅力一樣。