Scientists here estimate about 300 living Sine Saloum, but they face numerous threats including pollution, and most problematically entanglement in nylon monofilament fishing nets.

这里的科学家估计有三百只座头海豚生活在辛萨鲁姆，但它们面临着无数的威胁，包括污染，最严重的问题是被尼龙单丝渔网缠住。

Perhaps the person we'd really like to say something to is dead or they may — just as problematically — be distracted, fragile or frightening.

也许我们真正想对其倾诉的人已经死了，或者他们可能——同样有问题——他们会分心、脆弱或害怕。

But these things, they're hardly a panacea -- in part because they're very expensive to build, but more problematically, because they induce car-oriented sprawl.

但这些东西， 它们并不是灵丹妙药——部分原因是它们的建造成本非常高，但更成问题的是， 它们会导致以汽车为导向的蔓延。