But research is revealing a hidden threat. 但这项研究揭露了一个隐藏着的威胁
their mother has left them hidden in the grass. 母亲会将它们藏在草丛中
They're hidden until they begin to develop 它们隐匿起来 直到绽放的时刻
Most of his prey is now hidden beneath the snow 他领地内的大多数猎物都
The lead dog drives the impala towards the hidden flankers. 头犬将黑斑羚赶向侧翼的埋伏区