牢牢的用法和樣例：
例句
-
船長(cháng)牢牢掌住航輪，以防船的側面迎著(zhù)風(fēng)浪。
The captain had to hold the wheel firmly to prevent the ship from broaching to. -
激進(jìn)分子就是把兩腿牢牢插在空氣中的人。
A radical is a man with both beet firmly planted in the air. -
柵欄的立柱牢牢地固定在地上。
The fence posts were fixed firmly in the ground.
