私たちのです (watashitachi no desu) may be used to express '(This/That/It/They/He, etc) is/are ours' in the Japanese language. As the subject is often omitted in Japanese, the subject of this sentence depends on context.
'(These/Those/They) are our parents.'
"Watashitachi nani suru" translates to "What are we doing" in English.
'(This/That/She) is my younger sister.'
Where's the bathroom.
'It is the first door on the right.'
'It is the second door on the left.'
"Shita" is a Japanese word and in English it means "Down"
I think you mean "genki desu ka". The correct way of spelling it in English would be "ogenki desu ka". It is Japanese for "How are you?" One would usually answer by saying "Genki desu. Anata wa?' which means "I'm fine, and you?"
"O-ai dekite ureshii desu" is a Japanese phrase and in English it means "Nice to meet you"
'The second number is 9.'
'The third number is 7.'
Bad romaji. Corrected: 'watashi wa anata no tsubasa desu koto wo shitteiru na'. It means 'You know that I am your wings'.