您要查找的是不是：
- One should not run about aimlessly during an alert. 空襲警報期間不可到處亂跑。
- She is always on the alert for some new calamity. 她總是保持警覺(jué)以防某種新的災難。
- The concrete walls are reinforced with steel rods. 混凝土墻是用鋼筋加固的。
- Keep on the alert; we're due for an inspection. 提防著(zhù)點(diǎn)，輪到檢查我們了。
- Be sure to be watchful or alert. 必須留神，千萬(wàn)要提防。
- They have put the army on the alert. 他們已使軍隊進(jìn)入戒備狀態(tài)。
- Our defences must be reinforced against attack. 我們必須加強防御設施以抵御進(jìn)攻。
- The alert leopard went up to a deer quietly. 警覺(jué)的豹子靜悄悄地走近一只鹿。
- An alert listener will have noticed the error. 耳朵尖的人能聽(tīng)出這個(gè)錯。
- The district was put on red alert during a terrorist bomb scare. 這個(gè)地區在得到恐怖主義者轟炸后作了應急準備。
- Alert to circumstances; attentive. 對周?chē)h(huán)境敏感的; 留心的
- Troops are on the alert against any possible aggression. 軍隊戒備著(zhù)可能的來(lái)犯。
- The boy was alert in answering the stranger's questions. 男孩很機敏地回答了陌生人的問(wèn)題。
- Although he's over eighty his mind is still remarkably alert. 他雖已年過(guò)八十，但頭腦仍然十分機敏。
- He reinforced his argument with many facts. 他用很多事實(shí)進(jìn)一步證實(shí)了他的論點(diǎn)。
- Articles in Time's Medical Section often alert readers to unsuspected ailments. 《時(shí)代》周刊醫藥欄目里的文章常告誡讀者對自己意想不到的疾病保持警惕。
- The regular troops need to be reinforced. 正規部隊將需要增援。
- This old bridge should be reinforced immediately. 這座古老的橋梁應當立即進(jìn)行加固。
- The cat is alert to every sound and movement. 那只貓對任何響動(dòng)都很警覺(jué)。
- He centers his constructions around reinforced concrete or steel skeletons. 他的建筑主要是以鋼筋混凝土或鋼為骨架的。
