rr arrive 到達, 到來 [Card #3; 字卡第3張: 第2個單字, 字母組合發音 rr]
rr = /r/(2個相同子音在一起, 只發一個音)

Some more examples(更多例字):array, arrange, carriage, carrot, parrot, carry, harry, marry, merry, berry, cherry, ferry, terry, sherry, quarry, quarrel, yarrow, borrow, sorrow, arrow, sparrow, marrow, narrow, narrate, narrator, mirror, horror, error, terror, terrible, territory, terrific, arrogant, arrear, arrest, correct, corrode, corrupt, corroborate, correspond, corral, correlate, barrel, barren, barrier, barricade, errand, errata, erratic, irradiate, irrigate, irritate, serrate, ferret, embarrass, terrace, torrid, herring, guerrilla