शुना by a dog, शार्दूलयोरिव like two tigers, रामलक्ष्मणयोः of both Rama and Lakshmana, गन्धम् smell, उपाघ्राय smelling, त्वया by you, सन्दर्शने in their sight, स्थातुम् to stand there, न शक्यं हि it will not be possible.
"Had you smelt the presence of Rama and Lakshmna, it would not have been possible for you to stand there, like a dog under the gaze of a pair of tigers.