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伏せる， ふせる
1. to turn over (face down), to lay face down, to lay upside down
2. to point downwards (eyes, head, etc.), to cast down (eyes)
3. to lie (one's body) face down, to lie flat (on the ground)
4. to conceal, to hide, to keep secret, to place in hiding (...
翻过去(面朝下)，面朝下放置，倒放；向下指(眼睛、头部等)，低下(眼睛)
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd
