In plain words
Presiding over My own Prakṛti, I send forth again and again this whole multitude of beings, helpless under the sway of their own nature.
Word for word
Controlling My own prakṛti, I send forth again and again this whole multitude of beings, helpless by the force of nature.
The commentators
Bhagavadgītābhāṣyam
एवम् अविद्यालक्षणाम् —
प्रकृतिं स्वां स्वीयाम् अवष्टभ्य वशीकृत्य विसृजामि पुनः पुनः प्रकृतितो जातं भूतग्रामं भूतसमुदायम् इमं वर्तमानं कृत्स्नं समग्रम् अवशम् अस्वतन्त्रम् , अविद्यादिदोषैः परवशीकृतम् , प्रकृतेः वशात् स्वभाववशात् ॥ ८ ॥
In plain words
So, in this way — the one whose whole defining mark is avidyā, ignorance —
I take hold of My own nature — the very stuff that is Mine — and, mastering it completely, I pour out this whole procession of beings again and again. Every one of them, right now, in full, has no power of its own — not because something outside forces it, but because ignorance and the faults that ride with it have made it dependent. And what drives the whole cycle isn't some outside will — it's simply the force of nature's own working.
Close to the Sanskrit
Thus, [the one] whose defining mark is ignorance —
Taking hold of My own prakṛti, [that is,] My own [nature], and subduing it, I emit again and again — arisen from prakṛti — this multitude of beings, [that is,] this aggregate of beings, the present, entire, [that is,] complete, powerless, [that is,] not independent — made subject to another by faults beginning with ignorance — by the force of prakṛti, [that is,] by the force of [its own] inherent nature.