bolt on

基本解釋

The load coefficient method of bolt on tensile strength calculation was improved.
對螺栓拉伸強度計算的載荷系數法作了進一步改進。
Could've just gone for a tiny lightning bolt on the forehead but, nope, went all the way.
難道就不能在額頭上紋一個小閃電么？不行，全都得上。
It is a one-speed bike with a skull flag and a lighting bolt on it.
是一輛單速自行車。上面還插著一面畫著骷髏頭和閃電的小旗子。
http://www.ypgogo.com

"There's a nut on the inside of the oil pan. The bolt came out. But the nut was not welded corectly to the oil pan,so the nut fell off.
On first impression, Bolt may seem to be a show-off.
He smiles at the television cameras, sticks out his tongue with antic poses and hand gestures, strikes his "lightning bolt" pose, and tells reporters that he is on his way "to being a legend."

Livemocha also allows Rosetta Stone to bolt on products in a lower price point.
FORBES: Rosetta Stone Acquires Livemocha And Expands Its Reach In The Cloud