例句與造句

1. The "'Whipple shield "'or "'Whipple bumper "', invented by Fred Whipple, is a type of hypervelocity impact shield used to protect manned and unmanned spacecraft from collisions with micrometeoroids and orbital debris whose velocities generally range between.
2. It's difficult to find hypervelocity impact shield in a sentence. 用hypervelocity impact shield造句挺難的