Q: fox-quick striker とはどういう意味ですか?
A: It means that the striker (I assume in soccer/football ? In soccer, the striker is the one who scores the goals) is as quick/fast as a fox. They are very quick.
Q: "And striker David Kelly, whose sending-off was the flashpoint of the battle, will not be suspended for any League games. " とはどういう意味ですか?
A: A soccer player who’s position is striker received a red card (kicked out of the game). This ejection started a fight on the field.
Q: striker とはどういう意味ですか?
A: It depends on the context. For instance, in fighting it is someone who is good at throwing and landing punches/kicks (as opposed to a grappler). I can help more if I know the context you want.


Q: the strikers wanted that the government lowered the fare. is that phrase correct?
A: The strikers wanted the Government to lower the fares.
Q: The strikers were angry この表現は自然ですか?
A: Close. Keep practising. :)
Q: striker has scoring-role and help teammate to scoring as attracted.
plz grammer check it.
A: A striker has the role of scoring [goals] and helping teammates score [goals, too].
I don't think you need "as attracted" -- it sounds confusing.

also: Please check my grammar.
Q: The striker has been recently hired and he's let the Chelsea fans down. この表現は自然ですか?
A: The striker is new to the team and he let the Chelsea fans down. (If this is a statement about sports.)