-----------------------------------
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)
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
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
