infant|infants

这项技术仍处于初期发展阶段，但潜力巨大。

This technology is still in its ___infant phase but shows great potential.

作为投资领域的新手，他需要向有经验的投资者学习。

As an ___infant in the world of investing, he needs to learn from experienced investors.

这个婴儿车是专门为婴幼儿设计的。

This stroller is designed specifically for ___infants.