They had to live in a rat infested super hot ship, where there was a lot of diseases spreading around, the crew mates in the ship expected them to behave and just go with the flow even in those conditions
1.explain 2.speak.It says real mastery of word.So we should pick up explan in the fist one cause 'hear' is so superficial and the second answer should be 'speak' cause it says with understanding, which means everybody should figure out what we wanna say.
