perorally administration的用法和样例：
例句
- Oral medication is more convenient, but associated with a higher rate of systemic side effects than vaginal administration.
口服给药更为方便，但相对阴道局部给药，系统性副作用更大。 - Oral is preferred to local vaginal therapy since systemic administration achieves therapeutic drug levels in the urethra and periurethral glands.
口服给药相对于局部用药更能达到尿道及尿道旁腺系统性药物治疗的目的。
