原文视听

Flying demands enormous skill and effort,
飞行需要极大的技巧和力气
and nowhere is that more evident than here,
在秘鲁安第斯山脉的小丘陵这里
in the foothills of the Peruvian Andes.
这一点看得最清楚
This female hummingbird hovers
这只雌蜂鸟在寻找花蜜
with precision in her quest for nectar.
精准无误的盘旋着
Her wing and tail design allow her to fly in any direction.
凭翅膀和尾巴的设计 它能飞向四面八方
But the male has a real problem flying.
但是雄蜂鸟实在飞不起来
And this is why
原因就在这儿
he's weighed down with two super-long tail feathers,
它被两根超长的尾羽拖累
tipped with cumbersome discs.
尾羽末梢是笨重的圆盘
This is the marvellous spatuletail hummingbird.
这是令人惊艳的叉拍尾蜂鸟
and these are his flags with which to seduce a mate.
这些是它用来引诱伴侣的旗帜
Waving them back and forth takes a lot of effort,
即使它安然的栖息在树上 来回摆荡这两根羽毛
even from the comfort of his perch,
也得花不少力气
but to win her heart he's got to go up a gear.
但要赢得雌鸟的心 它非加把劲不可

重点解释

Her wing and tail design allow her to fly in any direction.凭翅膀和尾巴的设计，它能飞向四面八方

allow主要用作及物动词,可用于被动结构,作“允许进入”解时其后可直接接表示方向的副词或介词,作“允许做某事”解时其后可直接接宾语,也可接双宾语,其间接宾语可转化为介词to的宾语,还可接以动词不定式(短语)作补足语的复合宾语。

The road is too narrow to allow the passage of gondola.

这条街太窄，大型货车不能通过。

My boss doesn't allow me to use the telephone.

老板不许我使用电话。

he's weighed down with two super-long tail feathers,tipped with cumbersome discs.它被两根超长的尾羽拖累，尾羽末梢是笨重的圆盘

weigh down使 ... 负重担； 使疲惫不堪； 使沉重

A ball of lead will weigh down an equal bulk of feathers.

一个铅球要比同样大小的羽毛团重。

Jane weighed down her repertory with these plays.

简加上这几出戏，使她的演出剧目得到了加强。

tip with 以 ... 为尖端

That thin red line tipped with steel.

那根细细的红线末端装有钢头。

but to win her heart he's got to go up a gear.但要赢得雌鸟的心，它非加把劲不可

go up上升，提高

A ragged shout went up from the small crowd.

这一小群人发出了刺耳的喊叫。