B2 in a way that will not become loose坚固地;牢固地
More examples
Carefully tighten the clamp until it firmly supports the pipette in a vertical position.
The tent pegs should be fixed firmly in place.
The hook had been screwed firmly into the wall.
The handle needs to be attached more firmly to the door.
Tighten the bolt until the lever fits firmly against the panel.
B2 strongly and tightly强而有力地
forcefully坚决地
B2 in a way that is certain or not likely to change无疑地,确定地,肯定地
See also: firm
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