英语翻译他立即带领医疗队奔赴地震灾区.(setoff)有人听见呼救的声音.（call）一分耕耘,一分收获.（leadto）他们防止河水污染有困难吗?（prevent...from...）地球上百分之七十的陆地被水覆盖.（

Question

英语翻译
他立即带领医疗队奔赴地震灾区.(set off)
有人听见呼救的声音.（call）
一分耕耘,一分收获.（lead to）
他们防止河水污染有困难吗?（prevent...from...）
地球上百分之七十的陆地被水覆盖.（be covered with）

Answer 1

He led the medical team and set off for the earthquake stricken zone.
Someone heard a call for help.
Hard work leads to success.(其实 no pains,no gains.最达意了 干嘛非得用lead to 这么俗的词)
Do they have any difficulty in preventing the river from pollution?
70% of the earth is covered with water.