"he worked for a brokerage house"
"firm convictions" "a firm mouth" "steadfast resolve" "a man of unbendable perseverence" "unwavering loyalty"
"a firm mattress" "the snow was firm underfoot" "solid ground"
"a firm grasp" "gave a strong pull on the rope"
"a firm contract" "a firm offer"
"his voice was firm and confident" "a firm step"
"stocks are still firm"
"holds a firm position as the country's leading poet"
"firm muscles"
"the post was still firm after being hit by the car"
"a firm ally" "loyal supporters" "the true-hearted soldier...of Tippecanoe" "fast friends"
"we firmly believed it" "you must stand firm"
"Your muscles will firm when you exercise regularly" "the rope tautened"
"tauten a rope"
误 He is a clerk in〔at, on〕 the firm of Smith Brothers.
正 He is a clerk with the firm of Smith Brothers.
析 表示“是某公司的职员”时, firm前通常用with。