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Idiom:
prim and proper (appropriate )
Hit the book:
Edge
Entrapment
Shut-off button
Secure
Unaware of
Be prone to
Mitten
Shoelace
Drawstring
Complex
Avoid the Steps' Edges
You should avoid the edges of an escalator's steps when riding one as possible entrapment may occur. Every escalator is designed to show the edge where you may be entrapped. The yellow lines in the sides of the escalator steps show the place where you should put your feet to avoid any entrapments.
