Keep sight of
不忘掉
?? 詞語組成解析
keep
[kip]
vt. 保持;保留;遵守;阻止;
vi. （食品）保持新;保持健康;
n. 保持，保養(yǎng);供養(yǎng)，撫養(yǎng);生活，生計(jì);飼料；牧草;
sight
[sa?t]
n. 視力;看見;視野;景象;
vt. 看見，發(fā)現(xiàn);瞄準(zhǔn);觀察;調(diào)準(zhǔn)瞄準(zhǔn)器;
vi. （用儀器）瞄準(zhǔn);觀察;
of
[?v]
prep. 關(guān)于;屬于…的;由…制成;
aux. 助動(dòng)詞 [非標(biāo)準(zhǔn)用語、方言] =have [主用于虛擬語氣];
??? 情景例句
I'd like to be a member.
我想加入做為會(huì)員。
I bought 3 pounds of flour.
我買了三磅面粉。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
測出回聲間隔的時(shí)間，便可算出該處海洋的深度。