Question

英语翻译，在线等！

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.

Answer 2

He leads the medical team to rush toward the earthquake disaster area immediately.
Some people hear the sound which calls for help.
A minute does farm work, a minute harvest.(lead to)
They prevented the river water pollution has the difficulty?
On Earth 70% lands by water cover.

Answer 3

he leads the medical team setting off to the earthquake-stricken zone instantly.
hear someone calling for help.
cultivation leads to harvest.
do they have any difficulties in preventing the river from being polluted?
70percent of the land of the earth is covered with flood.