例句與造句

1. In building them, flat timbers of oak are bent to the requisite shape by steaming; they are bolted to a flat keel, at distances of a foot from each other.
2. In addition, there were smaller oared vessels, such as the " navis actuaria ", with 30 oars ( 15 on each bank ), a ship primarily used for transport in coastal and fluvial operations, for which its shallow draught and flat keel were ideal.
3. {{ quote | At frame 18 the vertical keel is broken in two and the flat keel is bent at an angle similar to the angle formed by the outside bottom plating . [ . . . ] In the opinion of the court, this effect could have been produced only by the explosion of a mine situated under the bottom of the ship at about frame 18, and somewhat on the port side of the ship . " ( part of the court's 5th finding)
4. It's difficult to find flat keel in a sentence. 用flat keel造句挺難的