这个问题仍然没有答案；事实上，根据所有证据，我们不能基于恐龙骨骼对恐龙生理学做出一个明确的声明。
This question remains unanswered; indeed, taking all the evidence into account, one cannot make a definitive statement about dinosaur physiology on the basis of dinosaur bone.
应用于某些可用拖车运输的，没有重固定龙骨的帆船上的一个系统。
A system used in some trailerable sailboats without a weighted fixed keel.
所有的帆船都为了这个理由需要某种龙骨：狭窄平滑的龙骨表面对于帆船的前行几乎没有阻力，但却能很好抗拒侧移力。
All sailboats need a keel of board for this reason: the narrow, flat surface of the board or keel produces little drag when the boat moves forward but resists motion sideways.
单桅帆船有一个主帆、三角帆和龙骨但没有船首斜桁的单桅小帆船。
A small sloop with a mainsail, jib, and keel but no bowsprit.
后来，洛维洛借钱赚钱的方法又上了一个新台阶：他组织人设计了一条船，在安装龙骨之前，他便找到一家运输公司，说服该公司预定包租这条八字还没有一撇的船。
Later on, Ludwig carried his business to a new stage of development: He got another tanker designed, Before the keel was even laid, a common carrier was persuaded to charter it after its completion.
平胸鸟的与一种平胸，没有一般飞翔性鸟类所特有的龙骨状突起的不会飞的鸟有关的；
Relating to or being any of a group of flightless birds having a flat breastbone without the keellike prominence characteristic of most flying birds.
平胸鸟的与一种平胸，没有一般飞翔性鸟类所特有的龙骨状突起的不会飞的鸟有关的；
Relating to or being any of a group of flightless birds having a flat breastbone without the keellike prominence characteristic of most flying birds.
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