缺乏

lack; want; fail; be devoid of; be hurting; be light on; absence; deficiency; shortage; scarcity; insufficiency; dearth; deprivation; bankruptcy; lacking; poor; deficient; insufficient; wanting; scarce; devoid; void; bereft; destitute; without; insufficiently; short of; devoid of; dis-; -less

技巧

skill; technique; trick; artistry; finesse; knack; skillful; skilled