slab keel龙骨: a bird's sternum fossil frag ...初: at the beginning of; in the ...强: make an effort; strive板: board; plank; plate龙骨补强板: slab keel下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:龙骨初强板,即可在微信中查询翻译