它们

He would draw them，all strung out in arow ，then look at them and destroy them.

他把图画出来，把排成一排，然后看一看就把毁掉。

Be guard against various sham theories. Don't be fooled by them.

"要警惕各种假理论,不要上当/不要为所欺骗。"

Instinct led the pigeons back to the roost.

鸽子本能使返回鸽棚。

He was going to make a tobacco pouch out of them.

他要用缝制一个烟草袋。

They are bilateral symmetrical animals with a triploblastic body plan.

是三胚层体制两侧对称。

All effects are dependent on their causes.

一切结果原因。

I've chosen them because of the colours.

我因颜色好而选了。

I reached the horses and untethered them.

我走到马旁解开系绳。

They usually require close management during calving.

在生小牛期间通常需要精心看护。

Cover the fish with a clean piece of white corf(cloth) and let them dry.

盖上块干净白布，晾干。

They're not like dogs; they're hideous brutes.

不像狗, 是丑陋畜牲。

They should not be treated only as amusements.

不能把单纯看成是娱乐活动。

They are known as the House of Representatives and the Senate.

被称为众议院和参议院。

When the fruits are ripe, they fall from the trees.

当果实成熟时, 从树上落下。

They are all chiral molecules and belong in the racemate.

是手性分子,属外消旋体。

You can catch these insects by tempting them to fly into a trap.

你可以引诱这些昆虫飞进罗网从而捉住。

Line up the glasses and I'll fill them.

把玻璃杯排好, 我来把倒满。

My nails are too long, I must file them down.

我指甲太长了, 必须把锉平。

Plants get the nutrition from the soil in which they grow.

植物从赖以生存土壤中吸收养分。

He put the cardboard boxes in a heap and stamped them down.

他把纸板箱堆成一堆, 将踩扁。