turtle
n
1 large reptile that lives in the sea and has flippers and a large horny shell 海龟.
2 (US) any of various types of reptile with a large shell, eg a tortoise, terrapin, etc (任何种类的)龟(如陆龟、 水龟等). =>illus at tortoise 见tortoise插图.
3 (idm 习语) turn `turtle (infml 口) (of a boat) turn upside down; capsize (指船)倾覆, 翻.
Yes, and we must stop people walking on this floor until it's firm. It may be necessary to put up a notice saying Keep off. Another thing, we' ll have to drill a hole in the wall for the electric wires.