rk bark 吠叫, 樹皮 [Card #8; 字卡第8張: 第5個單字, 字母組合發音 rk]

Some more examples（更多例字）：embark, ark, dark, park, lark, hark, mark, remark, bookmark, landmark, trademark, shark, spark, stark, jerk, perk, clerk, work, fork, stork