It finds its prey by detecting the minute electric fields produced by muscles when they contract, including the hard muscles, something no animal can ever switch off.
它通过探测包括心肌在内的肌肉收缩所产生的微电场来寻找猎物，心肌收缩是任何生物都不能停止的Q%V0lTP!yK-cQPM[#sC。
But they do have to swim directly over a beating heart to know that it's there.
但它们需要游到这颗心脏的上方才能感知位置~.3dW%E7wF-3。
By sucking and blowing, the sting-ray escavates its target deep under the soft sand.
通过吸和吹，这只刺鳐将细沙下的猎物挖了出来PcLp!sYsn],+D。
Many rays feeding together reduces series of florals on the seafloor, but all that puffing and blowing can attract unwelcome attention.
许多一起觅食的鳐在海床上制造了一连串的沙沟，而吞云吐雾会招来不怀好意的关注X&q,Mq2~4^k0iZ5l6Ux。
The hunter can just easily become the hunted.
猎手很容易变成猎物.f.YHmPFg9u+=U_H2。
This is the sting-ray's worst nightmare,a great hammer-head shark.
这是刺鳐最大的噩梦，一条无沟双髻鲨o5ZIe;oijt+R1_&.Qulm。
It has electric receptors,too.
它也有电感受器Bvkvq=n(|hc2;Vf=1ye。
They spread across the underside of its very broad head, which sweeps back and forth, searching for prey.
它们分布在双髻鲨宽脑袋的下底面，脑袋来回摇动寻找猎物r^ukRt]3Pd_8Id。
The sting-ray has a formidable weapon, a venomous barb, but one hammer-head was found with 96 barbs in its body, and see none the worth.
刺鳐有一种强大的武器毒刺，但是曾在一条双髻鲨身上发现过96根这样的毒刺)9~X6,[8=Lm[LV5。