青年中文sight-hole的意思
sight-hole中文翻譯：
窺視孔
觀察孔
sight───vt.看見；瞄準；n.視力；景象；眼界；見解；adj.見票即付的；即席的；vi.瞄準；觀看
sight words───視覺詞，常用詞（sightword的名詞復數）
hole───vt.鑿洞；vi.鑿洞，穿孔；（高爾夫球等）進洞；n.(Hole)人名；(瑞典、挪)霍勒；(英)霍爾；n.洞，孔；洞穴，穴；突破口
first sight───第一眼；乍看起來；初見
unjust sight───不義之見
sight reading───一看就能奏出、唱出或譯出的本領；視奏，視唱；讀譜訓練
dioptric sight───屈光視力
poor sight───[醫]視力不良；視力低下
drilling hole───鉆孔
A few years ago scientists were surprised by the sight of two planes carving a hole through a cloud—which then began spewing snow.───前，科學家對兩架飛機在云中形成一個空洞，隨后開始飄雪的現象很是驚異。
phenomenon and spalling time of the test piece can be observed continuously through a sight hole.───通過窺視孔可連續觀察試件表面的脫皮現象和得出激熱開裂時間。
time, tides filled the hole with sand and water, creating a secluded watery Eden where determined beach bums can swim, sunbathe and kayak largely out of sight.───時間一長，潮水帶來的細沙和海水覆蓋了這個炸彈洞，造就了這個遠離喧囂的海上伊甸園，海濱達人在這里游泳，曬日光浴，劃皮艇。
Causes and prevention of boiler sight hole leakage───鍋爐檢查孔泄漏的原因及預防