常見例句雙語例句The rafters, spaced at approximately 80cm centers, are nailed to the purlin.椽子釘在連系梁上，中心間距爲(wèi)80厘米。When they are actually fixed on top of the wall, they are known as wall plates. The rafters, spaced at approximately 80cm centers, are nailed to the purlin.如果它們實際埋置於牆躰內(nèi)，就把它們稱爲(wèi)臥梁。椽子釘在連系梁上，中心間距爲(wèi)80厘米。 返回 space center