-----------------------------------

理論， りろん

1. theory

tbd

more...           more words...

-----------------------------------

説得力， せっとくりょく

1. persuasiveness, powers of persuasion, cogency

tbd

more...           more words...

-----------------------------------

には

1. to, for, on, in, at 2. in order to, for 3. as for, regarding 4. while it is (was) the case that ..., indeed ... (but), certainly ... (but)

tbd

more...           more words...