1

他

tā

(third-person singular) (since the early 20th century, usu. male) he; him; his (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)

2

對

duì

right; correct towards; at; for concerning; regarding to treat (sb a certain way) to face (bound form) opposite; facing; matching to match together; to adjust to fit; to suit to answer; to reply to add; to pour in (a fluid) to check; to compare classifier: couple; pair

3

室內

shìnèi

indoor

4

灰塵

huīchén

dust

5

過敏

guòmǐn

(medicine) allergic; hypersensitive (fig.) oversensitive; prone to overreact