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everyone knows that.地球人都知道
Everyone knows that a film has a script, and this script must be followed when being filmed.
大家都知道一部電影就有一個劇本，拍電影的時候就必須得照著這個劇本來拍。
sign up 跟…簽訂合同; 報名
Many people who sign up to facebook quickly find they have no use for it.
很多在facebook上注冊的人很快就會發現，他們根本用不上它。
Attention, guests, this is your last chance to sign up for the ice-dancing contest.
注意了,大家!這是您的最后機會來登記參加冰上之舞比賽
