======================語法常識回顧=================
這里講述的是將來完成進行式及其相應(yīng)的時間狀語。
Will have been doing 將一直進行了···有多少時間
例如：
1)· I shall have finished this novel in two months time. 二個月之后我就把這本小說寫成了。
· 比較： I shall have finished this novel by December. 到十二月之前我就把這本小說寫成了。
2)·I shall have been writing this novel for ten years by then (by next July).到那時之前（到明年七月之前）我將一直寫這本小說有十年之久了。
《 Dangerous Descent / 危險的出艙活動》


In future, astronauts will be required to descend from a spaceship while it is still in space and to return to it. The ability to do this will be necessary in future flights to distant planets. Scientists are now trying to discover if this is possible.
{ 到將來，人們將要求宇航員在飛船停在太空時從飛船里走下來并且再回到里面去。再將來向遙遠地行星飛行時就需要有這樣做的能力。科學(xué)家們目前正在試圖發(fā)現(xiàn)有沒有這種可能性。}
The spaceship Astra which left the earth a short time ago, will be travelling three hundred miles into space. At a certain point, the Astra will stop for a short time and an astronaut will attempt to leave the stationary spaceship and then return to it.
{不久前離開地球地阿斯屈拉號飛船準(zhǔn)備飛行三百英里進入太空。阿斯屈拉號將在某一地點稍停片刻，而宇航員將試圖離開靜止的宇宙飛船然后再回到里面去。}
We shall not know whether the experiment has been successful until we have received a radio message. The first message is expected to arrive at 7 o'clock this evening. By that time, the Astra will have been flying through space for seventeen hours and will have circled the earth a great many times. When the first radio message have been received, the results of the trip will be announced immediately.
{直到我們接受到了無線電信息時才會知道實驗是否已成功。第一次信息預(yù)計在今晚七點到達。到七點鐘之前一段時間，阿斯屈拉號將一直穿越太空飛行了有十七個小時，同時也將環(huán)繞地球轉(zhuǎn)過好多圈了。一 第一次電報收到時就將立即宣布這次飛行的結(jié)果。}


詞 匯 注 解


ability 能力，用 to + 不定式
will be travelling 準(zhǔn)備（打算）飛行
attempt to 試圖
stationary 靜止不動的，stationery:文具，信箋
a radio message 無線電信息
be expected to 預(yù)計···
a great many times 許多許多次
descent 下降