Does it tell us how they will actually use the product we're building?
他们将如何使用我们正在生产的产品吗?
It is not grammatical to say 'They is.'
说“they is”不符合语法规则。
🌱 联想助记
【记】they-他们,obey-顺从:他们很顺从
📖 牛津释义
they
pers
pron 人称代词 (used as the subjectof a v 用作动词的主体)
1 people, animals or things mentioned earlier or being observed now (已经提到过的或正涉及到的)人、 动物或事物; 他们; 她们; 它们
`Where are John and Mary?' `They went for a walk.' `约翰和玛丽呢?'`他们散步去了.'
I've got two sisters. They'reboth doctors. 我有两个姐姐. 她们都是医生.
They (eg The things you are carrying) go on the bottom shelf. 这些东西(如你拿著的)放在架子的底层上.
2 (used informally instead of he or she 在口语中用以代替he或she)
If anyone arrives late they'll have to wait outside. 谁要是迟到, 他就得在外面等著. =>Usage at he 用法见he.
3 people in general 人们: They say we're going to have a hot summer. 人家说今年夏天很热.
They've (ie The people in authority have) sent us another form to fill in. 上面(负责人)又送来一个表格让我们填写. Cf 参看 them.
After all, all living creatures live by feeding on something else, whether it be plant or animal, dead or alive, and it is only by chance that such a fate is avoided.