- 穿孔: bore a hole; punch a hole; p ...
- 的: 4次方是 The fourth power of 2 i ...
- 衬: line; place sth. underneath
- 层: I storey; tier; stratum
- 穿孔的: chaded; fenestrated; foraminous; lithodomous; lithophagous; lithotomous; perforated; perforating; perforative; pinked; porous; ruptured; terebrant
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