(duì, ㄉㄨㄟˋ) couple; pair; to be opposite; to oppose; to face; for; to; correct (answer); to answer; to reply; to direct (towards sth); right [CE-DICT]
于
(Yú, ㄩˊ) surname Yu [CE-DICT]
(yú, ㄩˊ) in; at; to; from; by; than; out of [CE-DICT]
这
(zhè, ㄓㄜˋ) this; these; (commonly pronounced zhei4 before a classifier, esp. in Beijing) [CE-DICT]
是
(これ) (pn) (1) (uk) (See 何れ・1,其れ・1,彼・あれ・1) this (indicating an item near the speaker, the action of the speaker, or the current topic); (2) (hum) this person (usu. indicating someone in one's in-group); (3) now; (4) (arch) here; (5) (arch) I (me); (6) (arch) certainly; (P) [EDICT]
(ぜ) (n) righteousness; justice; right [EDICT]
(shì, ㄕˋ) is; are; am; yes; to be [CE-DICT]
挺
(ちょう) (ctr) counter for long and narrow things such as guns, scissors, spades, hoes, inksticks, palanquins, candles, jinrikishas, shamisen, oars, etc. [EDICT]
(tǐng, ㄊㄧㄥˇ) straight and stiff; rather (good); quite; very; classifier for guns or machinery [CE-DICT]
难
(nán, ㄋㄢˊ) difficult (to...); problem; difficulty; difficult; not good [CE-DICT]